Maryland Dialing Codes, Country Codes and Area Codes

CityCountry CodesArea CodesDialing Codes
Annapolis+1410+1 410
Baltimore+1410+1 410
Bethesda+1301+1 301
Bowie+1301+1 301
Catonsville+1443+1 443
Clinton+1301+1 301
Columbia+1803+1 803
Dundalk+1443+1 443
Ellicott City+1443+1 443
Essex+1443+1 443
Frederick+1301+1 301
Gaithersburg+1240+1 240
Germantown+1301+1 301
Glen Burnie+1443+1 443
Hagerstown+1301+1 301
Montgomery Village+1301+1 301
Olney+1301+1 301
Parkville+1443+1 443
Perry Hall+1410+1 410
Pikesville+1443+1 443
Potomac+1301+1 301
Randallstown+1410+1 410
Rockville+1301+1 301
Severn+1443+1 443
Severna Park+1443+1 443
Silver Spring+1301+1 301
Towson+1410+1 410

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