312 Area Code
Area code 312 is in Illinois covering Chicago .
312 Area Code Phone Lookup
203/475
Cities covering area code 312
Chicago
Zip Codes that Use 312 Area Code
60661
60611
60605
60614
60610
60603
60633
60602
60606
60608
60622
60601
60406
60612
60647
60654
60620
60090
60607
60626
60625
60643
60616
60623
60514
60089
60522
60062
60561
60604
60157
60513
60634
60657
60068
60656
60638
61820
60505
60659
60010
60302
60639
60641
60670
60651
60652
60102
60628
60181
60637
60025
60630
60015
60106
60004
60640
Phone Number Prefixes inArea code 312
| Prefix | County | City | Carrier | Type |
|---|---|---|---|---|
| (312) 201 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 202 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 203 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 204 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 205 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 206 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 207 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 208 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 209 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 210 | Cook | Chicago | Landline | |
| (312) 212 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 213 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 214 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 215 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 216 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 217 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 218 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 220 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 221 | Cook | Chicago | Wireless | |
| (312) 222 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 223 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 224 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 225 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 226 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 228 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 229 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 230 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 231 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 232 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 233 | Cook | Blue Island | Ameritech Illinois | Landline |
| (312) 234 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 235 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 236 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 237 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 238 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 239 | Cook | Chicago | At&t Local | Landline |
| (312) 240 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 241 | Cook | Chicago | Wireless | |
| (312) 242 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 243 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 244 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 245 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 246 | Cook | Wheeling | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 247 | Cook | Chicago | Globalcom, Inc.-il | Landline |
| (312) 249 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 250 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 251 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 252 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 253 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 254 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 255 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 256 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 258 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 259 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 260 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 261 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 262 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 263 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 264 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 265 | Cook | Chicago | Access One, Inc. - Il | Landline |
| (312) 266 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 267 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 268 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 269 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 271 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 272 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 274 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 275 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 276 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 277 | Cook | Chicago | Allegiance Telecom, Inc. - Il | Landline |
| (312) 278 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 279 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 280 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 281 | Cook | Chicago | Global Crossing Local Services, Inc.-il | Landline |
| (312) 282 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 283 | Cook | Chicago | Global Crossing Local Services, Inc.-il | Landline |
| (312) 284 | Cook | Chicago | Xo Illinois, Inc. | Landline |
| (312) 285 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 286 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 287 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 288 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 289 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 290 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 291 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 293 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 294 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 295 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 296 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 297 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 298 | Cook | Chicago | Sigecom, Llc - Il | Landline |
| (312) 299 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 300 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 301 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 302 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 303 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 304 | Dupage | Hinsdale | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 305 | Cook | Northbrook | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 306 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 307 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 308 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 309 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 310 | Dupage | Darien | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 313 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 314 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 315 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 316 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 317 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 318 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 320 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 321 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 322 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 323 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 324 | Cook | Chicago | Level 3 Communications, Llc - Il | Landline |
| (312) 325 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 326 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 327 | Cook | Chicago | Xo Illinois, Inc. | Landline |
| (312) 328 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 329 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 330 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 331 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 332 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 333 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 334 | Cook | Chicago | Globalcom, Inc.-il | Landline |
| (312) 335 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 336 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 337 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 338 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 339 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 341 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 342 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 343 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 344 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 345 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 346 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 347 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 348 | Cook | Chicago | Neutral Tandem-illinois, Llc - Il | Landline |
| (312) 349 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 350 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 351 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 352 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 353 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 354 | Dupage | Medinah | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 355 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 356 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 357 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 358 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 359 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 360 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 361 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 362 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 363 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 364 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 365 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 366 | Cook | Brookfield | Usa Mobility Wireless, Inc. | Wireless |
| (312) 367 | Cook | Brookfield | Usa Mobility Wireless, Inc. | Wireless |
| (312) 368 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 369 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 370 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 371 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 372 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 373 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 374 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 375 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 376 | Cook | Chicago | Cbeyond Communications, Llc-il | Landline |
| (312) 377 | Cook | Chicago | Xo Illinois, Inc. | Landline |
| (312) 378 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 379 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 380 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 381 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 382 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 383 | Cook | Chicago | Wireless | |
| (312) 384 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 385 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 386 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 387 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 388 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 389 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 390 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 391 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 393 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 394 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 395 | Cook | Chicago | At&t Local | Landline |
| (312) 396 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 397 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 398 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 399 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 400 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 401 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 402 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 403 | Cook | Brookfield | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 404 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 405 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 406 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 407 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 408 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 409 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 410 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 412 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 413 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 415 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 416 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 417 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 418 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 419 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 420 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 421 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 422 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 423 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 424 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 425 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 426 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 427 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 428 | Cook | Chicago | Level 3 Communications, Llc - Il | Wireless |
| (312) 429 | Cook | Chicago | Global Crossing Local Services, Inc.-il | Landline |
| (312) 430 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 431 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 432 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 433 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 435 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 436 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 437 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 438 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 440 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 441 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 442 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 443 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 444 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 445 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 446 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 447 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 449 | Cook | Park Ridge | American Messaging (am), Inc. | Wireless |
| (312) 450 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 451 | Cook | Chicago | T-mobile Usa, Inc. | Landline |
| (312) 452 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 453 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 454 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 455 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 456 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 457 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 458 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 460 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 461 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 462 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 463 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 464 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 465 | Cook | Chicago | Landline | |
| (312) 466 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 467 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 469 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 470 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 472 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 473 | Cook | Chicago | Ymax Communications Corp. - Il | N/A |
| (312) 474 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 475 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 476 | Cook | Chicago | United States Cellular Corp. - Illinois | Landline |
| (312) 478 | Cook | Chicago | Landline | |
| (312) 479 | Cook | Chicago | At&t Local | Landline |
| (312) 480 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 482 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 484 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 485 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 486 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 488 | Cook | Chicago | Pg Telecom Of Illinois Inc. - Il | N/A |
| (312) 489 | Champaign | Champaign | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 490 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 491 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 492 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 493 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 494 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 495 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 496 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 497 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 498 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 499 | Kane | Aurora | Ameritech Illinois | Landline |
| (312) 501 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 502 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 503 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 504 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 505 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 506 | Cook | Chicago | Cimco Communications, Inc. - Il | Landline |
| (312) 507 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 510 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 512 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 513 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 514 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 515 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 516 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 518 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 519 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 520 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 521 | Cook | Chicago | At&t Local | Landline |
| (312) 523 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 524 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 525 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 526 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 527 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 528 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 529 | Cook | Chicago | At&t Local | Landline |
| (312) 530 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 531 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 532 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 533 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 534 | Chicago | Ameritech Illinois | N/A | |
| (312) 537 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 540 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 541 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 542 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 543 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 544 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 545 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 546 | Cook | Chicago | Level 3 Communications, Llc - Il | Landline |
| (312) 547 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 548 | Chicago | Broadwing Communications, Llc - Il | N/A | |
| (312) 550 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 551 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 552 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 553 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 554 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 556 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 557 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 558 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 559 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 560 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 562 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 563 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 564 | Cook | Chicago | Cimco Communications, Inc. - Il | N/A |
| (312) 565 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 566 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 567 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 568 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 569 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 570 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 571 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 572 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 573 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 574 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 575 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 576 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 577 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 578 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 580 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 582 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 583 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 587 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 588 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 589 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 590 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 591 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 592 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 593 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 594 | Chicago | Mcimetro, Ats, Inc. | N/A | |
| (312) 595 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 596 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 597 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 599 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 601 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 602 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 603 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 604 | Cook | Chicago | Xo Illinois, Inc. | Landline |
| (312) 605 | Cook | Chicago | Wireless | |
| (312) 606 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 607 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 608 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 609 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 610 | Cook | Chicago | Wireless | |
| (312) 612 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 613 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 614 | Cook | Chicago | Wireless | |
| (312) 615 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 616 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 617 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 618 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 619 | Cook | Chicago | Cellular Paging Usa, Inc. | Wireless |
| (312) 621 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 622 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 623 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 624 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 625 | Cook | Chicago | Global Naps, Inc. - Il | Landline |
| (312) 626 | Chicago | Infotelecom, Llc - Il | N/A | |
| (312) 627 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 628 | Cook | Chicago | Xo Illinois, Inc. | Landline |
| (312) 629 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 630 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 632 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 633 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 634 | Lake | Barrington | Ameritech Illinois | Landline |
| (312) 635 | Cook | Chicago | Global Crossing Local Services, Inc.-il | Landline |
| (312) 636 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 637 | Cook | Oak Park | Broadwing Communications, Llc - Il | Landline |
| (312) 638 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 639 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 640 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 641 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 642 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 643 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 644 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 645 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 646 | Cook | Chicago | Cost Plus Communications, Llc - Il | N/A |
| (312) 647 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 648 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 649 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 650 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 651 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 652 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 653 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 654 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 655 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 656 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 657 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 658 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 659 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 660 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 661 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 662 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 663 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 664 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 665 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 666 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 669 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 670 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 671 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 672 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 673 | Cook | Chicago | Globalcom, Inc.-il | Landline |
| (312) 674 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 675 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 676 | Cook | Chicago | Globalcom, Inc.-il | N/A |
| (312) 677 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 678 | Cook | Chicago | Wireless | |
| (312) 679 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 680 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 681 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 682 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 683 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 685 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 688 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 689 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 690 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 691 | Cook | Chicago | Indiana Paging Ntwk | Wireless |
| (312) 692 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 693 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 694 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 695 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 696 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 697 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 698 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 699 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 701 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 703 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 704 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 705 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 706 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 707 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 709 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 710 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 712 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 713 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 714 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 715 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 716 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 717 | Cook | Brookfield | Usa Mobility Wireless, Inc. | Wireless |
| (312) 718 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 719 | Cook | Chicago | United States Cellular Corp. - Illinois | Wireless |
| (312) 720 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 724 | Cook | Chicago | Wireless | |
| (312) 725 | Chicago | Bandwidth.com Clec, Llc - Il | N/A | |
| (312) 726 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 727 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 729 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 730 | Cook | Chicago | At&t Local | Landline |
| (312) 731 | Cook | Chicago | T-mobile Usa, Inc. | Landline |
| (312) 732 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 733 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 735 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 737 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 738 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 739 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 740 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 742 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 743 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 744 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 745 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 746 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 747 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 748 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 749 | Mchenry | Algonquin | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 750 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 751 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 752 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 753 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 755 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 756 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 758 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 759 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 760 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 762 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 765 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 766 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 768 | Cook | Chicago | At&t Local | Landline |
| (312) 769 | Cook | Chicago | Indiana Paging Ntwk | Wireless |
| (312) 770 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 771 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 772 | Chicago | Denali Spectrum License, Llc | N/A | |
| (312) 775 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 777 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 780 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 781 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 782 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 784 | Cook | Chicago | Globalcom, Inc.-il | N/A |
| (312) 785 | N/A | |||
| (312) 786 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 787 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 788 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 789 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 790 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 791 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 793 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 794 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 795 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 796 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 797 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 798 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 799 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 801 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 802 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 803 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 804 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 805 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 806 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 807 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 808 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 810 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 812 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 813 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 814 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 816 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 817 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 818 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 819 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 820 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 821 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 822 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 823 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 824 | Dupage | Villa Park | Wireless | |
| (312) 825 | Cook | Chicago | Wireless | |
| (312) 826 | Cook | Chicago | Wireless | |
| (312) 827 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 828 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 829 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 830 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 831 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 832 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 833 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 834 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 835 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 836 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 837 | Cook | Glenview | Usa Mobility Wireless, Inc. | Wireless |
| (312) 839 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 840 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 841 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 842 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 844 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 845 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 846 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 848 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 849 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 850 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 851 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 852 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 853 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 854 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 855 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 856 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 857 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 858 | N/A | |||
| (312) 859 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 860 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 861 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 862 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 863 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 864 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 865 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 867 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 869 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 870 | Cook | Chicago | Globalcom, Inc.-il | Landline |
| (312) 873 | Cook | Chicago | Mci Worldcom Communications, Inc. - Il | Landline |
| (312) 875 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 876 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 877 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 878 | Chicago | Peerless Network Of Illinois, Llc - Il | N/A | |
| (312) 879 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 880 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 881 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 882 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 884 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 886 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 887 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 888 | Geckotech, Llc - Il | N/A | ||
| (312) 890 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 891 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 892 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 893 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 894 | Cook | Chicago | Mcimetro, Ats, Inc. | Landline |
| (312) 895 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 896 | Cook | Chicago | Broadwing Communications, Llc - Il | Landline |
| (312) 897 | Cook | Chicago | Adbeep, Llc | Wireless |
| (312) 898 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 899 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 901 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 902 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 903 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 904 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 905 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 906 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 907 | Cook | Chicago | Nextel Communications, Inc. | Wireless |
| (312) 908 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 909 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 910 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 912 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 913 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 914 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 915 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 916 | Cook | Chicago | American Messaging (am), Inc. | Wireless |
| (312) 917 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 919 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 920 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 921 | Chicago | Ameritech Illinois | N/A | |
| (312) 922 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 923 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 924 | Cook | Chicago | Paetec Communications, Inc. - Il | Landline |
| (312) 925 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 926 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 927 | Cook | Chicago | T-mobile Usa, Inc. | Wireless |
| (312) 928 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 929 | Cook | Chicago | T-mobile Usa, Inc. | N/A |
| (312) 930 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 931 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 932 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 933 | Cook | Chicago | Sprint Spectrum L.p. | Wireless |
| (312) 934 | Lake | Deerfield | Wireless | |
| (312) 935 | Dupage | Bensenville | Ameritech Illinois | Landline |
| (312) 936 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 937 | Cook | Chicago | Wireless | |
| (312) 938 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 939 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 940 | Cook | Chicago | Wireless | |
| (312) 941 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 942 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 943 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 944 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 945 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 946 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 948 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 949 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 951 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 952 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 953 | Cook | Arlington Heights | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 954 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 955 | Cook | Chicago | Rcn Telecom Services Of Illinois, Inc. - Il | Landline |
| (312) 956 | Lake | Deerfield | Adbeep, Llc | Wireless |
| (312) 957 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 960 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 961 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 962 | Cook | Chicago | Global Crossing Local Services, Inc.-il | Landline |
| (312) 963 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 964 | Cook | Chicago | Wireless | |
| (312) 965 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 968 | Cook | Chicago | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 969 | Cook | Brookfield | Cellco Partnership Dba Verizon Wireless - Il | Wireless |
| (312) 970 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 971 | Cook | Chicago | Wireless | |
| (312) 972 | Cook | Chicago | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 974 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 977 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 979 | Cook | Chicago | Ameritech Illinois | Wireless |
| (312) 980 | Cook | Chicago | Teleport Communications Group - Chicago | Landline |
| (312) 981 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 982 | Cook | Chicago | Usa Mobility Wireless, Inc. | Wireless |
| (312) 983 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 984 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 985 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 986 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 987 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 988 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 990 | Dupage | Clarendon Hills | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 991 | Lake | Buffalo Grove | New Cingular Wireless Pcs, Llc - Il | Wireless |
| (312) 992 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 993 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 994 | Cook | Chicago | Ovation Communications Of Illinois, Inc. | Landline |
| (312) 996 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 997 | Cook | Chicago | Ameritech Illinois | Landline |
| (312) 998 | Cook | Chicago | Multi Computer Systems, Inc. | Wireless |
Want to Know more about area code 312?
2,005,136
Total Number of Phone Numbers with +1-3121,222,268
Total Number of Owners with +1-3121,967
Total Number of carriers in the area code1
Total Number of cities in the area code75/25
% of Landline vs Wireless phone numbers32.9 y.o.
Average Age$172,116
Medium Home value$42,850
Median Income2,695,598
Total population0.16%
Crime RateCounties that Use Area Code 312
Cook
Current time in 203 Area Code
20:53 PM on Apr 18, 2024
The 312 area code lies within the Pacific Daylight Time Zone (or PDT)