In 1999 due to increasing population, the Phoenix area was split from the 602 area code into three separate area codes: 602, 623 and 480. A person's area code would depend on where they live.

Next month, people with 602 and 623 area codes must start dialing 10 digits (their area code +their phone number) for all local calls. The Utilities Department of the Arizona Corporation ...

Since then, 623 and 480 have become a part of the Phoenix phone number canon, but 602 will always be the city's original area code. It's fairly common for major cities to form holidays around ...

Anyone with a 480, 602 or 623 phone number will be affected by the change. Beginning Aug. 12, 602 or 623 phone numbers must dial the area code and phone number on all calls, including ones within ...

Answer: For those of you who weren't living in the Valley when it was all part of the "602," it's time for a little "area code history." For the rest of us who lived through the transition, this ...