Belvidere, IL Area Codes
Belvidere, Illinois (population 25,462) uses area codes 815 and 779.
Carriers with Belvidere numbers
10 prefixes are assigned to the Belvidere exchange: 10% mobile, 30% VoIP and cable, 60% landline.
| Carrier | Prefixes |
|---|---|
| Lumen (Level 3) | 2 |
| Frontier | 2 |
| Nuso | 2 |
| Onvoy (Sinch) | 1 |
| Aero North Communications | 1 |
| AT&T Mobility | 1 |
| Digital Network Access Communications | 1 |
Area codes used in Belvidere
| Area code | Prefixes serving Belvidere | Main carriers in this code |
|---|---|---|
| 815 | 7 | Frontier, AT&T (Illinois Bell), Lumen (Level 3) |
| 779 | 3 | Onvoy (Sinch), AT&T Mobility, Stratus Networks |
Belvidere phone number prefixes
Numbers starting with these first six digits were originally assigned to the Belvidere exchange.
815-323Lumen (Level 3)815-544Frontier815-547Frontier815-566Lumen (Level 3)815-604Onvoy (Sinch)815-912Aero North Communications815-975AT&T Mobility779-330Nuso779-359Nuso779-552Digital Network Access Communications
Nearby cities in area code 815
- Joliet
- Rockford
- Plainfield
- Crystal Lake
- DeKalb
- McHenry
- New Lenox
- Lockport
- Woodstock
- Homer Glen
- Loves Park
- Kankakee
Questions
- What is the area code for Belvidere, IL?
- Belvidere uses 2 area codes: 815 and 779. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Belvidere in?
- Belvidere is in the Central time zone.