Area Code 410

Area Code 410 is in Maryland

Other Maryland Area Codes
240, 301, 410, 443, 667

Maryland Area Code Overlays
(301 and 240) - (410 and 443 and 667)


Area Code 410 History:

10/06/1991

Area code 410 was put into service. Area code 410 was created from a split of area code 301. In 1997 area code 410 was overlaid with area code 443.

Area code 667 is proposed as an overlay of area codes 443 and 410. The scheduled implementation date is 03/24/2012 and mandatory 10 digit dialing will be required.

Ten digit dialing (area code + seven digit number) is necessary in the 410/443/667 overlay because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.

Counties in Maryland within area code 410 include:

Anne Arundel County, Baltimore County, Baltimore City County, Calvert County, Caroline County, Carroll County, Cecil County, Dorchester County, Harford County, Howard County, Kent County, Queen Annes County, Somerset County, Talbot County, Wicomico County, and Worcester County.

Major cities or places in Maryland within area code 410 include:

Area codes 410, 443 and 667 serve eastern Maryland, including the larger cities and communities of Annapolis, Arbutus, Arnold, Baltimore, Bel Air North, Bel Air South, Carney, Catonsville, Columbia, Crofton, Dundalk, Edgewood, Eldersburg, Elkridge, Ellicott City, Essex, Glen Burnie, Lochearn, Milford Mill, Odenton, Parkville, Perry Hall, Pikesville, Randallstown, Reisterstown, Salisbury, Severn, Severna Park, South Gate, and Towson in addition to many smaller communities.

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