The 520 area code received a few more years of life as Southern Arizona's solo area code after Arizona Corporation Commission ...

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

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 ...

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 this Sunday. The change — made to ...

Tucson's area code 520 was the most common local number used by robocallers in the U.S. last month, with more than 8.6 million calls generated, TNS data shows. Phoenix's 602, the East Valley's 480 and ...