Longmont, CO Area Codes
Longmont is served by area codes 303, 720 and 983. It is in Colorado, Boulder County. About 143,444 people live in its 4 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 303, 720, 983 |
| State / province | Colorado |
| County | Boulder County |
| Population | 143,444 |
| ZIP codes | 4 |
| Time zone | Mountain |
| Coordinates | 40.1667, -105.1108 |
What area code is Longmont in?
| Area code | Main state | Population covered | Overlap |
|---|---|---|---|
| 303 | Colorado | 3,294,473 | — |
| 720 | Colorado | 3,294,174 | Yes |
| 983 | Colorado | 3,276,231 | Yes |
ZIP codes in the code footprint
Nearby towns and their area codes
Berthoud 970Erie 303, 720, 983Lafayette 303, 720, 983Boulder 303, 720, 983Johnstown 970Louisville 303, 720, 983Broomfield 303, 720, 983Fort Lupton 303, 720, 983
How to dial
Dial 303 + 7 digits for a number in Longmont, or +1 303 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.