The state of Maryland, USA is currently served by a total of 6 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.
City | County | Area Code(s) |
---|---|---|
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 |