What area code is O'Fallon, MO?
| City | O'Fallon, MO |
|---|---|
| State | Missouri |
| Area code | 636 |
| Time zone | Central Time |
| Phone prefixes | 24 in our data |
Look up a O'Fallon number
About area code 636
| Area code | Also covers |
|---|---|
| 636 | St. Peters, St. Charles, Chesterfield and Ballwin |
Other places in area code 636
- St. Peters, MO
- St. Charles, MO
- Chesterfield, MO
- Ballwin, MO
- Fenton, MO
- Festus, MO
- Wentzville, MO
- Arnold, MO
- Washington, MO
- Union, MO
- Troy, MO
- High Ridge, MO
- Warrenton, MO
- Cedar Hill, MO
- De Soto, MO
- Eureka, MO
- Lake Saint Louis, MO
- Pacific, MO
- Saint Clair, MO
- Hillsboro, MO
- Pevely, MO
- Wright City, MO
- Marthasville, MO
Questions
- What is the area code for O'Fallon, Missouri?
- O'Fallon uses area code 636.
- What time zone is O'Fallon in?
- O'Fallon is in Central Time.
- Do I need to dial the area code for a local call in O'Fallon?
- Usually yes. Most of the US and Canada now uses 10-digit local dialing, so it’s safest to include 636.
- How do I call O'Fallon from another country?
- Dial your country’s exit code (011 from most places, 00 from Europe), then 1, then the area code and number: +1 636 XXX XXXX.