In Arizona, the new requirement applies to local calls in the 480, 520 and 928 area codes but not in the 602 and 623 area codes.

TUCSON (KVOA) - Changes are coming to the way you make a phone call. If you have a 520, 480 or 928 area code, get ready to dial all 10 numbers. The change kicks in Sunday. Phone users here in ...

The new 928 area code actually became functional last June, but telecommunications providers were given a little more than six months to update their systems and come into compliance.

HEADS UP, ARIZONA: Residents with area codes 480, 520 and 928 will have to transition to 10-digit dialing for all local calls later this year.

Residents in three large area codes in Arizona will have to transition to 10-digit dialing later this year, the Arizona Corporation Commission announced.

Starting Sunday, phone users in much of Arizona must include area codes when dialing to make all calls, including local calls that previously required only seven digits.

Starting Sunday, phone users in much of Arizona must include area codes when dialing to make all calls, including local calls that previously required only seven digits.