Union, MO Area Codes
Union is served by area code 636. It is in Missouri, Franklin County. About 20,708 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 636 |
| State / province | Missouri |
| County | Franklin County |
| Population | 20,708 |
| ZIP codes | 1 |
| Time zone | Central |
| Coordinates | 38.4219, -91.0193 |
What area code is Union 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
Saint Clair 636Washington 636Sullivan 573Pacific 636Eureka 636House Springs 636Foristell 636Hillsboro 636
How to dial
Dial 636 + 7 digits for a number in Union, or +1 636 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.