Hillsdale Area Code
We have found 8 cities with names similar to "Hillsdale". Below is the list of cities that match your search criteria.
Hillsdale, IL area code
Hillsdale, 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 | Hillsdale, 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 |
Hillsdale, KS area code
Hillsdale, KS is served by area code 913. 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 | Hillsdale, KS |
| Area Code | 913 |
| State | Kansas |
| 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 |
Hillsdale, WY area code
Hillsdale, WY is served by area code 307. 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 | Hillsdale, WY |
| Area Code | 307 |
| State | Wyoming |
| Country | United State |
| Time Zone | Mountain Standard Time (MST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-47 |
| In Service Date | 01-JAN-47 |
Hillsdale, MI area code
Hillsdale, MI is served by area code 517. 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 | Hillsdale, MI |
| Area Code | 517 |
| State | Michigan |
| 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 |
Hillsdale, MO area code
Hillsdale, MO is served by area code 314. 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 314 is part of an overlay complex (314/557), 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 | Hillsdale, MO |
| Area Code | 314 |
| Overlay Complex | 314/557 |
| State | Missouri |
| 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 |
Hillsdale, NC area code
Hillsdale, NC is served by area code 336. This area code was initially assigned on 10-DEC-97 and has been in continuous service since 15-DEC-97, supporting the city's growing communication needs over the years.
The area code 336 is part of an overlay complex (336/743), 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 | Hillsdale, NC |
| Area Code | 336 |
| Overlay Complex | 336/743 |
| State | North Carolina |
| Country | United State |
| Time Zone | Eastern Standard Time (EST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 10-DEC-97 |
| In Service Date | 15-DEC-97 |
Hillsdale, NJ area code
Hillsdale, NJ is served by area code 201. 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 201 is part of an overlay complex (201/551), 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 | Hillsdale, NJ |
| Area Code | 201 |
| Overlay Complex | 201/551 |
| State | New Jersey |
| 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 |
Hillsdale, OK area code
Hillsdale, OK is served by area code 580. This area code was initially assigned on 11-SEP-97 and has been in continuous service since 01-NOV-97, supporting the city's growing communication needs over the years.
| City Name | Hillsdale, OK |
| Area Code | 580 |
| State | Oklahoma |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 11-SEP-97 |
| In Service Date | 01-NOV-97 |
