Keystone Area Code
We have found 6 cities with names similar to "Keystone". Below is the list of cities that match your search criteria.
Keystone, CO area code
Keystone, CO is served by area code 970. This area code was initially assigned on 21-SEP-94 and has been in continuous service since 02-APR-95, supporting the city's growing communication needs over the years.
The area code 970 is part of an overlay complex (748/970), 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 | Keystone, CO |
| Area Code | 970 |
| Overlay Complex | 748/970 |
| State | Colorado |
| Country | United State |
| Time Zone | Mountain Standard Time (MST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 21-SEP-94 |
| In Service Date | 02-APR-95 |
Keystone, FL area code
Keystone, FL is served by area code 813. This area code was initially assigned on 01-JAN-53 and has been in continuous service since 01-JAN-53, supporting the city's growing communication needs over the years.
The area code 813 is part of an overlay complex (813/656), 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 | Keystone, FL |
| Area Code | 813 |
| Overlay Complex | 813/656 |
| State | Florida |
| Country | United State |
| Time Zone | Eastern Standard Time (EST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-53 |
| In Service Date | 01-JAN-53 |
Keystone, SD area code
Keystone, SD is served by area code 605. This area code was initially assigned on 01-JAN-47 and has been in continuous service since 01-JAN-47, supporting the city's growing communication needs over the years.
| City Name | Keystone, SD |
| Area Code | 605 |
| State | South Dakota |
| Country | United State |
| Time Zone | Central/Mountain Time |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-47 |
| In Service Date | 01-JAN-47 |
Keystone, IA area code
Keystone, IA is served by area code 319. This area code was initially assigned on 01-JAN-47 and has been in continuous service since 01-JAN-47, supporting the city's growing communication needs over the years.
| City Name | Keystone, IA |
| Area Code | 319 |
| State | Iowa |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-47 |
| In Service Date | 01-JAN-47 |
Keystone, WV area code
Keystone, WV is served by area code 304. This area code was initially assigned on 01-JAN-47 and has been in continuous service since 01-JAN-47, supporting the city's growing communication needs over the years.
The area code 304 is part of an overlay complex (304/681), 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 | Keystone, WV |
| Area Code | 304 |
| Overlay Complex | 304/681 |
| State | West Virginia |
| Country | United State |
| Time Zone | Eastern Standard Time (EST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-47 |
| In Service Date | 01-JAN-47 |
Keystone, NE area code
Keystone, NE is served by area code 308. This area code was initially assigned on 01-JAN-55 and has been in continuous service since 01-JAN-55, supporting the city's growing communication needs over the years.
| City Name | Keystone, NE |
| Area Code | 308 |
| State | Nebraska |
| Country | United State |
| Time Zone | Central/Mountain Time |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-55 |
| In Service Date | 01-JAN-55 |
