Maryland Area Codes

The state of Maryland, USA is currently served by a total of 6 area codes:

• 227
• 240
• 301
• 410
• 443
• 667

Overlaying area codes

These Maryland area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.

• 301/240/227
• 410/443/667

Larger Maryland cities and their area codes

City	County	Area Codes
Annapolis	Anne Arundel	410, 443, 667
Baltimore	Baltimore City	410, 443, 667
Bethesda	Montgomery	301, 240, 227
Bowie	Prince George's	301, 240, 227
Catonsville	Baltimore	410, 443, 667
Clinton	Prince George's	301, 240, 227
College Park	Prince George's	301, 240, 227
Columbia	Howard	410, 443, 667
Dundalk	Baltimore	410, 443, 667
Ellicott City	Howard	410, 443, 667
Essex	Baltimore	410, 443, 667
Frederick	Frederick	301, 240, 227
Gaithersburg	Montgomery	301, 240, 227
Germantown	Montgomery	301, 240, 227
Glen Burnie	Anne Arundel	410, 443, 667
Hagerstown	Washington	301, 240, 227
Montgomery Village	Montgomery	301, 240, 227
Odenton	Anne Arundel	410, 443, 667
Olney	Montgomery	301, 240, 227
Owings Mills	Baltimore	410, 443, 667
Parkville	Baltimore	410, 443, 667
Pikesville	Baltimore	410, 443, 667
Potomac	Montgomery	301, 240, 227
Randallstown	Baltimore	410, 443, 667
Rockville	Montgomery	301, 240, 227
Salisbury	Wicomico	410, 443, 667
Severn	Anne Arundel	410, 443, 667
Severna Park	Anne Arundel	410, 443, 667
Silver Spring	Montgomery	301, 240, 227
Towson	Baltimore	410, 443, 667
Waldorf	Charles	301, 240, 227

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