Exhausted area codes and recommended overlays

In the United States and Canada, Aircall provides phone numbers in nearly all area codes. However, some major metropolitan areas have exhausted area codes, meaning nearly all available numbers within those area codes have been assigned to telephone service providers. This limitation affects the entire telecommunications industry.

Even though an area code is considered exhausted, not all numbers within it are necessarily in use by customers.

Tip: You may be able to obtain a number with another provider or premium service and port it to Aircall.

Understanding overlays

To address the issue of exhausted area codes, the North American Numbering Plan Administrator (NANPA) introduces new area codes that overlap existing ones. These are known as overlay area codes.

If a specific area code you want is out of stock, consider using one of its overlay area codes as an alternative.

Exhausted area codes in the US and Canada

Note: This list is subject to change as new overlays are introduced or numbering resources are adjusted by the North American Numbering Plan Administrator (NANPA).