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Maryland Area Codes

Area codes Selected cities
240, 301Frederick, Hagerstown, Bethesda
410, 443Baltimore, Salisbury, Annapolis
Source: North American Numbering Plan Administration. Web: www.nanpa.com .

To find phone numbers, area code information, and area code maps, see our White Pages.


Maine Area CodesArea Codes: United States, Canada, CaribbeanMassachusetts Area Codes