The U.S. state that uses 567 is Ohio. This sequence forms a crucial part of its telephone numbering system, specifically as an area code.
Understanding Area Code 567 in Ohio
The number 567 functions as a telephone area code within the North American Numbering Plan (NANP). It is primarily designated for the northwestern part of Ohio, operating as an overlay area code for the existing area code 419. This means that both area codes, 419 and 567, serve the exact same geographical territory.
Geographic Coverage of 567
Area code 567, in conjunction with 419, covers a significant region of northwestern Ohio. This expansive area includes a mix of major urban centers and numerous smaller towns and communities.
- Prominent Cities and Regions Served:
- Toledo
- Sandusky
- Lima
- Findlay
- Bowling Green
- Fremont
- Mansfield (parts of the area)
- Other surrounding areas in the northwestern quadrant of the state.
The Purpose of Overlay Area Codes
An overlay area code like 567 is introduced when the demand for new telephone numbers in a specific region outgrows the capacity of a single area code. Rather than splitting the existing area code, which would necessitate number changes for some residents, an overlay simply adds a new area code to the same service area.
Key Characteristics of Overlay Codes:
- Increased Number Capacity: Overlays effectively expand the pool of available telephone numbers, accommodating population growth, increased mobile phone usage, and new communication services.
- Mandatory Ten-Digit Dialing: In areas with an overlay, it becomes mandatory to dial all ten digits (the three-digit area code followed by the seven-digit local number) for all calls, even those considered local within the same area code. This ensures that calls are routed correctly, as the same seven-digit number sequence can now exist under two different area codes within the same geographic region.
Ohio's Area Code Landscape
Ohio employs a system of multiple area codes to manage its extensive telephone network across various regions. Area code 567 is an integral part of this framework, particularly for its role in northwestern Ohio.
The following table provides a general overview of some of Ohio's area codes:
| Area Code | Primary Geographic Region Covered | State |
|---|---|---|
| 567 | Northwestern Ohio (overlay for 419) | Ohio |
| 419 | Northwestern Ohio | Ohio |
| 216 | Cleveland metropolitan area | Ohio |
| 330 | Northeastern Ohio, including Akron, Canton, Youngstown (overlay) | Ohio |
| 440 | Northeastern Ohio, outer ring around Cleveland (overlay) | Ohio |
| 513 | Southwestern Ohio, including Cincinnati | Ohio |
| 614 | Central Ohio, including Columbus (overlay) | Ohio |
| 740 | Southeastern and parts of central Ohio (overlay for 614) | Ohio |
| 937 | West-central Ohio, including Dayton | Ohio |
This structured system of area codes ensures efficient and organized telephone communication across the entire state of Ohio.
