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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
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 ...
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 ...
Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...
This page was last edited on 24 December 2023, at 10:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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 ...
In 1962, AT&T assigned the first N10 code in area code 510, for conversion to dial service of the Teletypewriter Exchange Service (TWX) in the United States. [2] [3] Later in the decade, the TWX dial system was extended with the new prefixes 710, 810, and 910. 710 was assigned to a region comprising the northeast of the United States (New England, New York, New Jersey, Pennsylvania, Maryland ...
Area code 835 was eventually approved by the Public Utility Commission on December 2, 2021. Assignment of central office codes in the new area code began on September 2, 2022. [4] When area codes were introduced in 1947, their middle digit was either 0 or 1. In 1994, area code 610 was the last area code assigned with digit 1 in that position.