Home › Illinois › Granite City
Granite City, IL Area Codes
Granite City, Illinois (population 26,807) uses area codes 618 and 730.
Carriers with Granite City numbers
25 prefixes are assigned to the Granite City exchange: 44% mobile, 12% VoIP and cable, 44% landline.
| Carrier | Prefixes |
|---|---|
| AT&T (Illinois Bell) | 9 |
| AT&T Mobility | 6 |
| T-Mobile | 5 |
| Onvoy (Sinch) | 3 |
| Paetec Itel | 2 |
Area codes used in Granite City
| Area code | Prefixes serving Granite City | Main carriers in this code |
|---|---|---|
| 618 | 22 | Frontier, AT&T (Illinois Bell), AT&T Mobility |
| 730 | 3 | AT&T Mobility, Onvoy (Sinch), AT&T (Teleport) |
Granite City phone number prefixes
Numbers starting with these first six digits were originally assigned to the Granite City exchange.
618-219Paetec Itel618-225AT&T (Illinois Bell)618-373AT&T Mobility618-419T-Mobile618-451AT&T (Illinois Bell)618-452AT&T (Illinois Bell)618-500Onvoy (Sinch)618-501Paetec Itel618-512AT&T (Illinois Bell)618-600Onvoy (Sinch)618-610AT&T Mobility618-709T-Mobile618-794AT&T Mobility618-797AT&T (Illinois Bell)618-798AT&T (Illinois Bell)618-801Onvoy (Sinch)618-802T-Mobile618-823T-Mobile618-876AT&T (Illinois Bell)618-877AT&T (Illinois Bell)618-931AT&T (Illinois Bell)618-981T-Mobile730-298AT&T Mobility730-299AT&T Mobility730-304AT&T Mobility
Nearby cities in area code 618
- Belleville
- Carpentersville
- O'Fallon
- Edwardsville
- Alton
- Collinsville
- Carbondale
- East St. Louis
- Godfrey
- Marion
- Cahokia Heights
- Fairview Heights
Questions
- What is the area code for Granite City, IL?
- Granite City 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 Granite City in?
- Granite City is in the Central time zone.