| 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 |
|---|---|---|---|
| 520-314 | Pima | Tucson, AZ | Level 3 Communications |
| 520-315 | Maricopa | Chandler, AZ | Gila River Telecomm |
| 520-316 | Pinal | Casa Grande, AZ | Qwest Corporation |
| 520-318 | Pima | Tucson, AZ | Qwest Corporation |
| 520-319 | Pima | Tucson, AZ | Qwest Corporation |
| 520-320 | Pima | Tucson, AZ | Qwest Corporation |
| 520-321 | Pima | Tucson, AZ | Qwest Corporation |
| 520-322 | Pima | Tucson, AZ | Qwest Corporation |
| 520-323 | Pima | Tucson, AZ | Qwest Corporation |
| 520-324 | Pima | Tucson, AZ | Qwest Corporation |
| 520-325 | Pima | Tucson, AZ | Qwest Corporation |
| 520-326 | Pima | Tucson, AZ | Qwest Corporation |
| 520-327 | Pima | Tucson, AZ | Qwest Corporation |
| 520-328 | Qwest Corporation | ||
| 520-329 | Pima | Tucson, AZ | Teleport Communications America |
| 520-331 | Pima | Tucson, AZ | T-mobile Usa |
| 520-332 | Pima | Tucson, AZ | Sprint Spectrum L.p. |
| 520-333 | Pima | Tucson, AZ | Xo Arizona |
| 520-334 | Pima | Tucson, AZ | Cellco Partnership DBA Verizon Wireless |
| 520-335 | Pima | Tucson, AZ | Cox Arizona Telcom |
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.