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 ...

PHOENIX — 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. As in many other ...

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 ...