Maryland Area Codes
5 area codes in Maryland, United States. Country code: +1. Find area codes by city and region.
All Maryland Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 240 | Suburban MD (overlay) | DC Metro |
| 301 | Silver Spring, Rockville | DC Metro |
| 410 | Baltimore, Annapolis | Central |
| 443 | Baltimore (overlay) | Central |
| 667 | Baltimore (overlay) | Central |
About Maryland Area Codes
Maryland uses 5 area codes under the North American Numbering Plan (NANP). When calling within Maryland, dial the 3-digit area code followed by the 7-digit phone number. From abroad: exit code + 1 + area code + number.