Maryland Area Codes
Maryland has 5 area codes: 240, 301, 410, 443, 667.
| Code | Region | Cities | Timezone |
|---|---|---|---|
| 240 | Western Maryland / Montgomery County | Germantown, Rockville, Frederick | Eastern |
| 301 | Western Maryland / Suburban DC | Rockville, Gaithersburg, Silver Spring | Eastern |
| 410 | Baltimore Metro | Baltimore, Annapolis, Towson | Eastern |
| 443 | Baltimore Metro Overlay | Baltimore, Columbia, Bowie | Eastern |
| 667 | Baltimore Area Overlay | Baltimore, Dundalk, Essex | Eastern |