Columbia, IL Area Codes
Columbia, Illinois (population 10,865) uses area codes 618 and 730.
Carriers with Columbia numbers
4 prefixes are assigned to the Columbia exchange: 25% mobile, 50% VoIP and cable, 25% landline.
| Carrier | Prefixes |
|---|---|
| Harrisonville Tel. Co. | 1 |
| AT&T (Teleport) | 1 |
| T-Mobile | 1 |
| Lumen (Level 3) | 1 |
Area codes used in Columbia
| Area code | Prefixes serving Columbia | Main carriers in this code |
|---|---|---|
| 618 | 3 | Frontier, AT&T (Illinois Bell), AT&T Mobility |
| 730 | 1 | AT&T Mobility, Onvoy (Sinch), AT&T (Teleport) |
Columbia phone number prefixes
Numbers starting with these first six digits were originally assigned to the Columbia exchange.
618-281Harrisonville Tel. Co.618-470AT&T (Teleport)618-719T-Mobile730-293Lumen (Level 3)
Nearby cities in area code 618
- Belleville
- Carpentersville
- O'Fallon
- Granite City
- Edwardsville
- Alton
- Collinsville
- Carbondale
- East St. Louis
- Godfrey
- Marion
- Cahokia Heights
Questions
- What is the area code for Columbia, IL?
- Columbia uses 2 area codes: 618 and 730. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Columbia in?
- Columbia is in the Central time zone.