Gilliam Area Code
We have found 2 cities with names similar to "Gilliam". Below is the list of cities that match your search criteria.
Gilliam, MO area code
Gilliam, MO is served by area code 660. This area code was initially assigned on 28-JUL-97 and has been in continuous service since 12-OCT-97, supporting the city's growing communication needs over the years.
| City Name | Gilliam, MO |
| Area Code | 660 |
| State | Missouri |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 28-JUL-97 |
| In Service Date | 12-OCT-97 |
Gilliam, LA area code
Gilliam, LA is served by area code 318. This area code was initially assigned on 01-JAN-57 and has been in continuous service since 01-JAN-57, supporting the city's growing communication needs over the years.
The area code 318 is part of an overlay complex (318/457), which serves the same geographic region. This means that multiple area codes are used in the same area to accommodate the increasing demand for phone numbers.
| City Name | Gilliam, LA |
| Area Code | 318 |
| Overlay Complex | 318/457 |
| State | Louisiana |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-57 |
| In Service Date | 01-JAN-57 |
