Sycamore, IL Area Codes
Sycamore, Illinois (population 19,083) uses area codes 815 and 779.
Carriers with Sycamore numbers
8 prefixes are assigned to the Sycamore exchange: 13% mobile, 25% VoIP and cable, 63% landline.
| Carrier | Prefixes |
|---|---|
| Metropcs | 2 |
| Frontier | 2 |
| AT&T Mobility | 1 |
| Telnyx | 1 |
| Nuso | 1 |
| Onvoy (Sinch) | 1 |
Area codes used in Sycamore
| Area code | Prefixes serving Sycamore | Main carriers in this code |
|---|---|---|
| 815 | 5 | Frontier, AT&T (Illinois Bell), Lumen (Level 3) |
| 779 | 3 | Onvoy (Sinch), AT&T Mobility, Stratus Networks |
Sycamore phone number prefixes
Numbers starting with these first six digits were originally assigned to the Sycamore exchange.
815-739Metropcs815-895Frontier815-899Frontier815-970Metropcs815-991AT&T Mobility779-222Telnyx779-367Nuso779-759Onvoy (Sinch)
Nearby cities in area code 815
- Joliet
- Rockford
- Plainfield
- Crystal Lake
- DeKalb
- McHenry
- New Lenox
- Lockport
- Woodstock
- Belvidere
- Homer Glen
- Loves Park
Questions
- What is the area code for Sycamore, IL?
- Sycamore 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 Sycamore in?
- Sycamore is in the Central time zone.