where is the 602 area code
North American area code 602 is a state of Arizona telephone area code that covers most of the city of Phoenix.It was one of the original area codes established in October 1947 and had originally covered the entire state of Arizona until 1995, when area code 520 was created as the state's second area code.any states introduced new area codes during this time period for much the same reason. Generally, greater Phoenix retained 602, except for a few outer portions of Maricopa County that switched to 520. Within only three years, however, 602 was close to exhaustion once again.