Frederick, MD Area Codes
Frederick is served by area codes 227, 240 and 301. It is in Maryland, Frederick County. About 154,625 people live in its 6 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 227, 240, 301 |
| State / province | Maryland |
| County | Frederick County |
| Population | 154,625 |
| ZIP codes | 6 |
| Time zone | Eastern |
| Coordinates | 39.4206, -77.4046 |
What area code is Frederick in?
| Area code | Main state | Population covered | Overlap |
|---|---|---|---|
| 227 | Maryland | 2,624,790 | Yes |
| 240 | Maryland | 2,823,102 | — |
| 301 | Maryland | 2,823,102 | Yes |
ZIP codes in the code footprint
21701, 21702, 21703, 21704, 21705, 21709
Nearby towns and their area codes
Walkersville 240, 301New Market 240, 301Middletown 227, 240, 301Monrovia 227, 240, 301Thurmont 227, 240, 301Clarksburg 227, 240, 301Mount Airy 227, 240, 301Damascus 227, 240, 301
How to dial
Dial 227 + 7 digits for a number in Frederick, or +1 227 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.