Updated August 5, 2020 |
Infoplease Staff
Table of contents
| Area codes | Selected cities |
|---|---|
| 240, 301 | Frederick, Hagerstown, Bethesda |
| 410, 443 | Baltimore, Salisbury, Annapolis |
Source: North American Numbering Plan Administration. Web: www.nanpa.com .
To find phone numbers, area code information, and area code maps, see our White Pages.
| Maine Area Codes | Area Codes: United States, Canada, Caribbean | Massachusetts Area Codes |
