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  2. List of Maryland area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Maryland_area_codes

    The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes:

  3. Area codes 301, 240, and 227 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_301,_240,_and_227

    Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...

  4. Seven-digit dialing - Wikipedia

    en.wikipedia.org/wiki/Seven-digit_dialing

    Central office code protection made it possible in some low-density areas to use seven digits to reach areas in another area code. Examples: Washington, D.C. (area code 202) to adjacent areas of Maryland (area code 301) and Virginia (area code 703), discontinued on October 1, 1990, to allow assignment of a code in all three area codes.

  5. Avoid Answering Calls from These Area Codes: Scam Phone ... - AOL

    www.aol.com/avoid-answering-calls-area-codes...

    Scam phone numbers: International Area Codes with a +1 Country Code. 232—Sierra Leone. 242 — Bahamas. 246 — Barbados. 268 — Antigua. 284 — British Virgin Islands. 345 — Cayman Islands.

  6. Area codes 410, 443, and 667 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_410,_443,_and_667

    The three area codes are overlay codes for one numbering plan area, among which 410 was the initial area code for the NPA, when it was split from area code 301 in 1991. 443 and 667 found assignment primarily in cellular service and for competitive local exchange carriers, such as Comcast and Cavalier Telephone, when introduced, but have since ...

  7. Laurel, Maryland - Wikipedia

    en.wikipedia.org/wiki/Laurel,_Maryland

    A small section of ZIP Code 20707 is located in Montgomery County. [67] [68] According to the United States Census Bureau, the city has a total area of 4.33 square miles (11.21 km 2), of which 4.30 square miles (11.14 km 2) is land and 0.03 square miles (0.08 km 2) is water. [69]