Monmouth Area Code
We have found 4 cities with names similar to "Monmouth". Below is the list of cities that match your search criteria.
Monmouth, CA area code
Monmouth, CA is served by area code 559. This area code was initially assigned on 06-NOV-97 and has been in continuous service since 14-NOV-98, supporting the city's growing communication needs over the years.
The area code 559 is part of an overlay complex (357/559), 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 | Monmouth, CA |
| Area Code | 559 |
| Overlay Complex | 357/559 |
| State | California |
| Country | United State |
| Time Zone | Pacific Standard Time (PST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 06-NOV-97 |
| In Service Date | 14-NOV-98 |
Monmouth, IL area code
Monmouth, IL is served by area code 309. 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 309 is part of an overlay complex (309/861), 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 | Monmouth, IL |
| Area Code | 309 |
| Overlay Complex | 309/861 |
| State | Illinois |
| 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 |
Monmouth, IA area code
Monmouth, IA is served by area code 563. This area code was initially assigned on 20-NOV-00 and has been in continuous service since 25-MAR-01, supporting the city's growing communication needs over the years.
| City Name | Monmouth, IA |
| Area Code | 563 |
| State | Iowa |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 20-NOV-00 |
| In Service Date | 25-MAR-01 |
Monmouth, OR area code
Monmouth, OR is served by area code 503. 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 503 is part of an overlay complex (503/971), 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 | Monmouth, OR |
| Area Code | 503 |
| Overlay Complex | 503/971 |
| State | Oregon |
| Country | United State |
| Time Zone | Pacific Standard Time (PST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-47 |
| In Service Date | 01-JAN-47 |
