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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 ...
The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. ... 443 667: eastern Maryland including Baltimore and Annapolis
List of Maryland area codes; 0–9. Area codes 301, 240, and 227; Area codes 410, 443, and 667 This page was last edited on 24 December 2023, at 10:16 (UTC) ...
I found "Four counties were split between area code 301 and 410. Anne Arundel County was assigned area code 410, except Laurel exchanges 210, 317, 490, 497, 498, 596, 604, 725, and 778 and Marlboro exchange 952 remained area code 301." Change 778 to 776.
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 ...
Area codes 410, 443, and 667; Metadata. ... English: Map showing area codes of eastern Maryland, highlighting other Maryland area codes, ...
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2023: returned to the pool of area codes available for future area code relief; 457: Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025 [3] to be overlaid on 318; previously a fictitious area code assigned to identify Naked DSL/Dry Loop and dedicated data lines in ...