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Arizona Corporation Commission

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Phoenix Office
Arizona Corporation Commission
1200 W. Washington St.
Phoenix, AZ 85007
(602) 542-4251
(800) 222-7000

Utilities Division
Steven M. Olea - Director

Tucson Office
Arizona Corporation Commission
400 W. Congress, Ste. 218
Tucson, AZ 85701
(520) 628-6550
(800) 535-0148

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General Information About Arizona's Area Codes

The 520 area code is running out of telephone number prefixes. This is happening because of increased demand for new telephone numbers used for such services as fax machines, pagers, wireless telephones, second telephone lines, voice mail and other competitive services. To remedy this situation, Arizona will add a new area code, 928, in the 520 region.

Arizona's New 928 Area Code
Use this chart to find out if your area code will change from 520 to 928.

All About Area Codes
Frequently Asked Questions and Answers

Press Releases

928 Area Code Becomes Mandatory January 5, 2002

Area Code Relief Maps

These files were created using Adobe Acrobat. Click "here" to download Adobe's free reader.

Metro Phoenix Area Code Map
Map produced by Wide World of Maps, Inc. The ACC has no affiliation with, and receives no compensation from, Wide World of Maps, Inc.

Map of Approved 520 Split

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