Signal Mountain, TN Area Codes
Signal Mountain is served by area code 423. It is in Tennessee, Hamilton County. About 17,188 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 423 |
| State / province | Tennessee |
| County | Hamilton County |
| Population | 17,188 |
| ZIP codes | 1 |
| Time zone | Eastern |
| Coordinates | 35.2121, -85.3623 |
What area code is Signal Mountain in?
| Area code | Main state | Population covered | Overlap |
|---|---|---|---|
| 423 | Tennessee | 1,424,610 | — |
ZIP codes in the code footprint
Nearby towns and their area codes
How to dial
Dial 423 + 7 digits for a number in Signal Mountain, or +1 423 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.