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  2. 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 ...

  3. 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: Area codes

  4. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    once reserved as a third area code for West Virginia, but it was replaced by a 304-932 exchange area code + exchange number in Charleston; 933: not in use; available for non-geographic assignment easily recognizable code (ERC) 934: New York (Suffolk County on Long Island) July 16, 2016: overlaid on 631; 935: not in use; available for geographic ...

  5. Category:Redirect-Class Telecommunications pages - Wikipedia

    en.wikipedia.org/wiki/Category:Redirect-Class...

    This category may be empty occasionally or even most of the time. ... All-figure numbers now; ... Talk:Area code 267; Talk:Area code 274; Talk:Area code 301; Talk ...

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

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

    In November 1990, a plan for a second area code, 410, was announced, that would be assigned to the Baltimore metropolitan area and the Eastern Shore, while western and southern Maryland, including the Washington suburbs, would retain area code 301. [2] Bell Atlantic (now Verizon), the largest telephone provider in the region, allowed the ...

  7. Area code 301 - Wikipedia

    en.wikipedia.org/?title=Area_code_301&redirect=no

    Area codes in the United States This page was last edited on 13 June 2023, at 05:48 (UTC) . Text is available under the Creative Commons Attribution-ShareAlike 4.0 License ; additional terms may apply.

  8. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    During the early 1990s, the numbering plan was reorganised with the numerous area codes merged into just five, but the requirement to dial the area code between local calling areas remained. This means even though Christchurch and Nelson are now both in the same area code, the area code has to be dialed for calls between the two cities.

  9. Area codes 240 and 301 - Wikipedia

    en.wikipedia.org/?title=Area_codes_240_and_301&...

    Pages for logged out editors learn more. Contributions; Talk; Area codes 240 and 301