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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 ...
Code Territory or use Date Notes 300: not in use; available for non-geographic assignment easily recognizable code (ERC) 301: Maryland (Silver Spring; Washington, D.C., suburbs; all counties which touch the Potomac River; Waldorf, Hagerstown, Frederick, Rockville, Cumberland; and land line telephones in western Maryland)
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 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.
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
Area code 301; Area code 302; Area codes 303, 720, and 983; Area codes 304 and 681; Area codes 305, 786, and 645; Area code 307; Area code 308; Area codes 309 and 861;
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) ... 301: Washington, D.C. suburbs and panhandle of Maryland: 249: 705: