Illinois area codes
Illinois has 17 area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 861, 872.
- 217 — Champaign-Urbana
- 224 — Arlington Heights
- 309 — Peoria
- 312 — Chicago
- 331 — Aurora
- 447 — Danville
- 464 — Tinley Park
- 618 — Collinsville
- 630 — Naperville
- 708 — La Grange
- 730 — Centralia
- 773 — Chicago
- 779 — Rockford
- 815 — Rockford
- 847 — Northbrook
- 861 — Peoria
- 872 — Chicago
Area codes by city in Illinois
- Chicago area codes
- Naperville area codes
- Rockford area codes
- Champaign area codes
- Champaign-Urbana area codes
- Decatur area codes
- Joliet area codes
- Evanston area codes
- Schaumburg area codes
- DeKalb area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.