Ontario Area Code
We have found 5 cities with names similar to "Ontario". Below is the list of cities that match your search criteria.
Ontario, CA area code
Ontario, CA is served by area code 909. This area code was initially assigned on 18-FEB-92 and has been in continuous service since 14-NOV-92, supporting the city's growing communication needs over the years.
The area code 909 is part of an overlay complex (840/909), 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 | Ontario, CA |
| Area Code | 909 |
| Overlay Complex | 840/909 |
| State | California |
| Country | United State |
| Time Zone | Pacific Standard Time (PST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 18-FEB-92 |
| In Service Date | 14-NOV-92 |
Ontario, WI area code
Ontario, WI is served by area code 608. 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.
The area code 608 is part of an overlay complex (353/608), 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 | Ontario, WI |
| Area Code | 608 |
| Overlay Complex | 353/608 |
| State | Wisconsin |
| Country | United State |
| Time Zone | Central Standard Time (CST) |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 01-JAN-55 |
| In Service Date | 01-JAN-55 |
Ontario, NY area code
Ontario, NY is served by area code 315. 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 315 is part of an overlay complex (315/680), 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 | Ontario, NY |
| Area Code | 315 |
| Overlay Complex | 315/680 |
| State | New York |
| 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 |
Ontario, OH area code
Ontario, OH is served by area code 419. 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 419 is part of an overlay complex (419/567), 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 | Ontario, OH |
| Area Code | 419 |
| Overlay Complex | 419/567 |
| State | Ohio |
| 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 |
Ontario, OR area code
Ontario, OR is served by area code 541. This area code was initially assigned on 19-MAY-95 and has been in continuous service since 05-NOV-95, supporting the city's growing communication needs over the years.
The area code 541 is part of an overlay complex (458/541), 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 | Ontario, OR |
| Area Code | 541 |
| Overlay Complex | 458/541 |
| State | Oregon |
| Country | United State |
| Time Zone | Mountain/Pacific Time |
| Code Type | General Purpose Code |
| In Service | Yes |
| Assignment Date | 19-MAY-95 |
| In Service Date | 05-NOV-95 |
