In my experience in the US, the carriers/operators have an area code or two, but it's in the local area code rather than regional area code. 10-digit example:

In my experience in the US, the carriers/operators have an area code or two, but it's in the local area code rather than regional area code. 10-digit example: XXX - YYY - zzzz The leaked data area codes are represented by the regional/XXX block and the carriers are in the local/YYY block in the 10-digit example.