Hillsboro, MO Area Codes
Hillsboro is served by area code 636. It is in Missouri, Jefferson County. About 18,744 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 636 |
| State / province | Missouri |
| County | Jefferson County |
| Population | 18,744 |
| ZIP codes | 1 |
| Time zone | Central |
| Coordinates | 38.2581, -90.5798 |
What area code is Hillsboro in?
| Area code | Main state | Population covered | Overlap |
|---|---|---|---|
| 636 | Missouri | 1,007,929 | — |
ZIP codes in the code footprint
Nearby towns and their area codes
How to dial
Dial 636 + 7 digits for a number in Hillsboro, or +1 636 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.