520 Area Code
The 520 area code serves Tucson and most of the southeastern part of the state of Arizona.
Federal Data
State Data
County Data
City Data
The 520 area code serves Tucson and most of the southeastern part of the state of Arizona.
Federal Data
State Data
County Data
City Data
Area code 520 covers Tucson and the majority of southeastern Arizona.
Area code 520 was created in 1995 from a split of area code 602. In 2001, area code 928 was created from another split of 520. Prior to October 24, 2021, area code 520 transitioned to ten-digit dialing.
Area code 520 is a general purpose code which was placed in service on March 19, 1995.
Our Arizona phone number lookup service will analyze the three-digit prefix of any 520 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Arizona geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
| Company | Number of Prefixes |
|---|---|
| QWEST CORPORATION | 179 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 68 |
| T-MOBILE USA, INC. | 52 |
| NEW CINGULAR WIRELESS PCS, LLC | 36 |
| ONVOY, LLC - AZ | 12 |
| LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 11 |
| LEVEL 3 COMMUNICATIONS, LLC - AZ | 9 |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 8 |
| BANDWIDTH.COM CLEC, LLC - AZ | 6 |
| COMCAST IP PHONE, LLC | 6 |
| VALLEY TEL COOP INC | 6 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 5 |
| GILA RIVER TELECOMM, INC. | 4 |
| METROPCS, INC. | 4 |
| AT&T - LOCAL | 3 |
| CENTURYLINK COMMUNICATIONS, LLC | 3 |
| TOHONO O'ODHAM UTILITY AUTHORITY | 3 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 2 |
| XO ARIZONA, INC. | 2 |
| YMAX COMMUNICATIONS CORP. - AZ | 2 |
| ARIZONA TEL. CO. | 1 |
| COMMIO, LLC | 1 |
| COMMNET WIRELESS, LLC | 1 |
| GILA LOCAL EXCHANGE CARRIER, INC. - AZ | 1 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - AZ | 1 |
| MCLEODUSA TELECOMMUNICATION SERVICES, INC. - AZ | 1 |
| MIDVALE TELEPHONE EXCHANGE, INC. | 1 |
| NUSO, LLC | 1 |
| ONVOY SPECTRUM, LLC | 1 |
| PEERLESS NETWORK OF ARIZONA, LLC - AZ | 1 |
| TABLE TOP TELEPHONE COMPANY | 1 |
| TELNYX LLC | 1 |
| VALLEY CONNECTIONS, L.L.C. - AZ | 1 |
| VONAGE AMERICA LLC | 1 |
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
| Rate Center | Number of Prefixes |
|---|---|
| TUCSON | 306 |
| CASAGRANDE | 36 |
| SIERRAVIST | 28 |
| NOGALES | 15 |
| BENSON | 8 |
| DOUGLAS | 5 |
| SAN MANUEL | 5 |
| WILLCOX | 5 |
| BISBEE | 3 |
| HAYDEN | 2 |
| SACATON | 2 |
| SELLS | 2 |
| SUPERIOR | 2 |
| AJO | 1 |
| BLACKWATER | 1 |
| BOWIE | 1 |
| CASABLANCA | 1 |
| CASCABEL | 1 |
| ELFRIDA | 1 |
| KOMATKE | 1 |
| PEARCE | 1 |
| PORTAL | 1 |
| SAN SIMON | 1 |
| SANTA ROSA | 1 |
| SASABE | 1 |
| SUNIZONA | 1 |
| TOMBSTONE | 1 |
| W SANSIMON | 1 |
| WHITLOW | 1 |
Browse other Arizona area codes: