Eureka, IL Area Code
Eureka, Illinois (population 5,129) uses area code 309.
Carriers with Eureka numbers
3 prefixes are assigned to the Eureka exchange: 0% mobile, 33% VoIP and cable, 67% landline.
| Carrier | Prefixes |
|---|---|
| Frontier | 2 |
| Onvoy (Sinch) | 1 |
Area codes used in Eureka
| Area code | Prefixes serving Eureka | Main carriers in this code |
|---|---|---|
| 309 | 3 | Frontier, AT&T (Illinois Bell), Onvoy (Sinch) |
Eureka phone number prefixes
Numbers starting with these first six digits were originally assigned to the Eureka exchange.
309-304Frontier309-466Onvoy (Sinch)309-467Frontier
Nearby cities in area code 309
- Peoria
- Bloomington
- Normal
- Moline
- Romeoville
- Rock Island
- Pekin
- Galesburg
- East Peoria
- Crest Hill
- East Moline
- Morton
Questions
- What is the area code for Eureka, IL?
- The area code for Eureka, Illinois is 309.
- What time zone is Eureka in?
- Eureka is in the Central time zone.