Find out why southern Arizona residents will soon encounter a new area code. Learn about the factors causing the shortage of phone numbers.

The addition of the 480 and 623 area codes in 1999 caused some initial confusion. The 520 area code was designated for areas outside Maricopa County in 1995. The 520 was split to add a 928 area code ...

Folks using the 520 area code to connect to Flagstaff phone numbers will no longer be able to do so, starting next week. Much of rural Arizona — including the Flagstaff region — will completely switch ...

PHOENIX — Residents in three large area codes in Arizona will have to transition to 10-digit dialing later this year, the Arizona Corporation Commission announced. Those in the area codes of 480, 520, ...

Sometime in the next five years or so, some southern Arizona residents are going to find out that their new neighbors have a ...

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

Tucson residents are among millions of Arizonans who will have to start dialing the area code along with the local seven-digit number when making phone calls, under new federal regulations set to go ...

Sometime in the next five years or so, some Southern Arizona residents are going to find out that their new neighbors have a different area code.