Area Code 203

Area Code 203 has been created in 1947 assigned to the southwestern part of the Connecticut.  The state of Connecticut is located in the New England area of the northeastern United States.  The Connecticut State holds the status of the 29th most populated, 48th largest area and number 4th most densely populated state. Currently, there are two active area codes for the Connecticut state.
States, Counties, and Cities Covered by Code 203
The western border, southern coast and areas beyond the New Haven City are covered by the Area Code 203. The last stop for this area code is the south of Hartford City. The rest of the Connecticut region uses the area code 860.
An overlay plan has already been proposed for the areas covered by the area code 860 and code 203.

State:

Connecticut (CT) is the only state that is served by Area Code 203:

Counties:

The Area Code for the southwestern side of the Connecticut state covers 11 counties total; some of the main cities are;

Fairfield, CT Hartford, CT Litchfield, CT

Nassau, CT New haven, CT New York, CT

Cites:

Out of the 85 cities covered by this Area Code the well-known cities are:

Ansonia Beacon falls Bethany Bethel Branford Bridgeport Brookfield Cheshire Danbury Darien Derby East haven

Easton Fairfield Greenwich Guilford Hamden Madison Meriden Middlebury Milford Naugatuck New Canaan New Fairfield

New Haven Newtown North Branford North haven Norwalk Orange Oxford Prospect Redding Ridgefield Seymour Shelton

Southbury Trumbull Wallingford West Hartford Weston Westport Wilton Wolcott Woodbridge Woodbury

There are 770 exchanges reserved for this Area Code.
All the areas using this code come under the Eastern Standard Time Zone.

Overlay Plan for the Area Code 203:

In August, 1999 The Connecticut Public Utility Commission found that the current stock of codes for the Connecticut area is expected to and proposed an overlay plan for the Area Code 203. The code 475 will be the new overlay code for code 203 and implemented on December 12, 2009. This new code will serve the same areas covered by the original code.
The Area Code 959 is the overly code for the code 860 and will serve the Bristol, Hartford, Norwich and the rest of northern and eastern Connecticut regions that currently uses the area code 860.
The residents of the area of code 203 are still using a 7-digit dialing system; but from May 16, 2009 a permissive but not mandatory 10-didigit dialing will be allowed. However a 10-digit dialing will be mandatory from November 14, 2009 to male local calls even in the same area. All the international and local telecom carriers are advised to activate the code 475 before December12, 2009.
This overlay plan will only effect how calls are dialed; code 203 and 475 both will serve the same area, so customers living in the these areas have to dial the code to make local calls.
Some Other Codes Serving the Connecticut Area:

•     Area Code 860     (Created in1995)
•     Area Code 959    (Created in 1999 will overlay 860)
•     Area Code 475  (Created in 1999 will overlay 203)

Colleges, Universities, ISPs and Telecom Carriers in the Area of Code:

College, School & Universities:

•     Arts & Sciences School
•     Fairfield University
•     University of Bridgeport
•     University of New Haven
•     Yale University School of Medicine

ISPs:

•     Basic ISP
•     Toast Net
•     Net Zero
•     Copper.Net

Telecom Carries:

• AT&T LOCAL
• BIG RIVER TELEPHONE COMPANY, LLC - MO
• BROADWING COMMUNICATINS. LLC - CA
• CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
• MPOWER COMMUNICATIONS CORP. - CA
• NETWORK SERVICES LLC
• NEW CINGULAR WIRELESS PCS, LLC
• O1 COMMUNICATIONS, INC. - CA
• PACIFIC BELL
• QWEST CORPORATION
• SOUTHWESTERN BELL TELEPHONE CO.- AR
• SPRINT SPECTRUM L.P.
• TELEPORT COMMUNICATIONS GROUP - LOS ANGELES
• USA MOBILITY WIRELESS, INC.
• XO ARIZONA, INC.
• XO CALIFORNIA, INC.

Reverse Phone Check Lookup Service for the Area Code 203:

The Mobile Reverse Lookup and Phone Directory both can be used to find any business or a missing friend living in any area with any code. The parents of the young kids are particularly using the Reverse Phone Number Directories to keep them from falling into any serious conditions. With the increasing use of the Mobile with unfamiliar or new codes, the importance of these reverse Telephone Directories have significantly increased.
Some of the debt collecting companies are also making use of the Reserve Telephone Directories before they contact the debtor via telephone or visit them in person. However it is almost impossible for the Reverse Phone Check Directories to maintain an up-to-date record of always changing cell phone numbers.