| District of Arizona area codes: 520 | |
|---|---|
| Country | United States |
| State/Province | Arizona |
| Major City | Phoenix |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 520-200 | Gila | Hayden, AZ | Electric Lightwave DBA Integra Telecom |
| 520-201 | Pinal | San Manuel, AZ | Electric Lightwave DBA Integra Telecom |
| 520-202 | Pima | Tucson, AZ | Tw Telecom Of Arizona LLC |
| 520-203 | Pima | Tucson, AZ | Xo Arizona |
| 520-204 | Pima | Tucson, AZ | Mcleodusa Telecommunications Services- Az |
| 520-205 | Pima | Tucson, AZ | Qwest Corporation |
| 520-206 | Pima | Tucson, AZ | Qwest Corporation |
| 520-207 | Maricopa | Chandler, AZ | Cox Arizona Telcom |
| 520-208 | Maricopa | Phoenix, AZ | Global Crossing Local Services-az |
| 520-209 | Pima | Tucson, AZ | Qwest Corporation |
| 520-210 | Pima | Tucson, AZ | Onvoy |
| 520-212 | Pima | Tucson, AZ | Midvale Telephone Exchange |
| 520-213 | Pinal | Casa Grande, AZ | T-mobile Usa |
| 520-215 | Pinal | Coolidge, AZ | Gila River Telecomm |
| 520-216 | Santa Cruz | Nogales, AZ | Cellco Partnership DBA Verizon Wireless |
| 520-218 | Pima | Tucson, AZ | Qwest Corporation |
| 520-219 | Pima | Tucson, AZ | Qwest Corporation |
| 520-220 | Cochise | Sierra Vista, AZ | T-mobile Usa |
| 520-221 | Cochise | Benson, AZ | Cellco Partnership DBA Verizon Wireless |
| 520-222 | Pima | Tucson, AZ | Qwest Corporation |
There are 477 prefixes, In the code area, the major cities are Casa Adobes, AZ;Casa Grande, AZ;Catalina Foothills. The major city is Phoenix.