The 520 area code received a few more years of life as Southern Arizona's solo area code after Arizona Corporation Commission staff found a way to prolong a change that's ...

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 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 ...