Waterloo, IL Area Code
Waterloo, Illinois (population 11,132) uses area code 618.
Carriers with Waterloo numbers
4 prefixes are assigned to the Waterloo exchange: 50% mobile, 0% VoIP and cable, 50% landline.
| Carrier | Prefixes |
|---|---|
| T-Mobile | 2 |
| Harrisonville Tel. Co. | 2 |
Area codes used in Waterloo
| Area code | Prefixes serving Waterloo | Main carriers in this code |
|---|---|---|
| 618 | 4 | Frontier, AT&T (Illinois Bell), AT&T Mobility |
Waterloo phone number prefixes
Numbers starting with these first six digits were originally assigned to the Waterloo exchange.
618-504T-Mobile618-938Harrisonville Tel. Co.618-939Harrisonville Tel. Co.618-986T-Mobile
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 Waterloo, IL?
- The area code for Waterloo, Illinois is 618.
- What time zone is Waterloo in?
- Waterloo is in the Central time zone.