What area code is Oswego, IL?
| City | Oswego, IL |
|---|---|
| State | Illinois |
| Area codes | 331 and 630 |
| Time zone | Central Time |
| Phone prefixes | 13 in our data |
Look up a Oswego number
Oswego’s area codes
| Area code | Also covers |
|---|---|
| 331 | Aurora, Naperville, Downers Grove and St. Charles |
| 630 | Schaumburg, La Grange, Naperville and Oak Brook |
Other places in area code 331
- Aurora, IL
- Naperville, IL
- Downers Grove, IL
- St. Charles, IL
- Lombard, IL
- Bolingbrook, IL
- Elmhurst, IL
- West Chicago, IL
- Wheaton, IL
- Geneva, IL
- Oak Brook, IL
- Sugar Grove, IL
- Yorkville, IL
- Elburn, IL
- Glen Ellyn, IL
- Itasca, IL
- Batavia, IL
- Big Rock, IL
- Plano, IL
- Warrenville, IL
- Schaumburg, IL
Questions
- What is the area code for Oswego, Illinois?
- Oswego uses 2 area codes: 331 and 630. 331 is the original or most common one, and newer numbers can be given 630.
- What time zone is Oswego in?
- Oswego is in Central Time.
- Do I need to dial the area code for a local call in Oswego?
- Yes. Because Oswego has more than one area code, local calls need all 10 digits: the area code plus the 7-digit number.
- How do I call Oswego from another country?
- Dial your country’s exit code (011 from most places, 00 from Europe), then 1, then the area code and number: +1 331 XXX XXXX.