Folks using the 520 area code to connect to Flagstaff phone numbers will no longer be able to do so, starting next week. Much of rural Arizona — including the Flagstaff region — will completely switch ...

The addition of the 480 and 623 area codes in 1999 caused some initial confusion. The 520 area code was designated for areas outside Maricopa County in 1995. The 520 was split to add a 928 area code ...