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Maryland Area Codes


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The state of Maine is situated in the Middle Atlantic Area of United States of America and its Capital is Annapolis. There are total seven area codes providing telephone services in the state of Maryland:

  • Area Code 240 (created in 1997)
  • Area Code 301 (created in 1947)
  • Area Code 410 (created in 1991)
  • Area Code 443 (created in 1997)
  • Area Code 227 (Reserved for 240)
  • Area Code 667 (Reserved for 443)
  • Area Code 410 (created in 1991)
Major companies providing telephone services in Maryland are:
  • BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL
  • GLOBAL CROSSING LOCAL SERVICES, INC.-CA
  • MOUNTAIN VIEW TELEPHONE CO.
  • MPOWER COMMUNICATIONS CORP. - CA
  • NEW CINGULAR WIRELESS PCS, LLC
  • PAC - WEST TELECOMM, INC.
  • PACIFIC BELL
  • QWEST CORPORATION
  • SPRINT SPECTRUM L.P.
  • TIME WARNER TELECOM OF CALIFORNIA, L.P.
  • USA MOBILITY WIRELESS, INC.
  • VERIZON CALIFORNIA INC.-CA
  • XO CALIFORNIA, INC.
A brief description of  Maryland Area Codes is given below:

It has been kept reserved for providing numbering relief to area code 240 in case when it gets exhausted and runs out of available phone numbers.

It was created as an overlay to code 301 on 1st June 1997. It was added as an overlay for providing numbering relief to area code 301.

It is one of the original area codes created by NANP in 1947. Area code 240 was added as an overlay to this code on 1st June 1997. Idea for adding an over area code was to provide numbering relief to area code 301.

It was formed in 1991 for providing numbering relief to area code 301. The code 301 provided telephone services in the state until 1991. Then it started getting exhausted because of the population spurts and exhausted demands for telephone lines.

It was added as an overlay for providing numbering relief to area code 410. These overlaid area codes are providing telephone services in the eastern half of the state. The code 443 went into effect on 1st July 1997.

It is kept reserved for providing numbering relief to area code 443. It will be implemented as soon as the existing area gets exhausted and runs out of available phone numbers.

It was introduced in 1995 for providing numbering relief to area code 803. It was formed as a result in split of area code 803.

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