| Area Code | 520 |
| State | Arizona |
| Current Time in Area Code 520 | 520> MST |
| Timezone | Mountain Standard Time |
| Regional Market Area | Metro Phoenix Tucson Area |
| Metro Area(s) | Nogales, AZ Phoenix-Mesa-Chandler, AZ Sierra Vista-Douglas, AZ Tucson, AZ |
| Population (2020) | 1641813 |
| Adjacent Area Codes | 480,575,602,623,928 |
| Cochise County |
| Pima County |
| Pinal County |
| Santa Cruz County |
| Avondale |
| Casa Grande |
| Casas Adobes |
| Catalina Foothills |
| Marana |
| Maricopa |
| Oro Valley |
| Sierra Vista |
| Tucson |