What area code is Crystal Lake, IL?
| City | Crystal Lake, IL |
|---|---|
| State | Illinois |
| Area codes | 815 and 779 |
| Time zone | Central Time |
| Phone prefixes | 21 in our data |
Look up a Crystal Lake number
Crystal Lake’s area codes
| Area code | Also covers |
|---|---|
| 815 | Rockford, Joliet, Kankakee and Woodstock |
| 779 | Rockford, Joliet, Momence and DeKalb |
Other places in area code 815
- Rockford, IL
- Joliet, IL
- Kankakee, IL
- Woodstock, IL
- DeKalb, IL
- Freeport, IL
- McHenry, IL
- Lockport, IL
- Plainfield, IL
- Sterling, IL
- Morris, IL
- Ottawa, IL
- Dixon, IL
- Oglesby, IL
- Peru, IL
- Princeton, IL
- Belvidere, IL
- New Lenox, IL
- Streator, IL
- Frankfort, IL
- Gardner, IL
- La Grange, IL
- Momence, IL
- Coal City, IL
Questions
- What is the area code for Crystal Lake, Illinois?
- Crystal Lake uses 2 area codes: 815 and 779. 815 is the original or most common one, and newer numbers can be given 779.
- What time zone is Crystal Lake in?
- Crystal Lake is in Central Time.
- Do I need to dial the area code for a local call in Crystal Lake?
- Yes. Because Crystal Lake has more than one area code, local calls need all 10 digits: the area code plus the 7-digit number.
- How do I call Crystal Lake from another country?
- Dial your country’s exit code (011 from most places, 00 from Europe), then 1, then the area code and number: +1 815 XXX XXXX.