520 area code
Area code 520 is in Arizona. It covers Tucson, San Tan Valley, Casas Adobes and 148 other places: 140 ZIP codes in Pima, Pinal, Cochise and 4 other counties. Local time there is , Mountain Time (most of Arizona does not change its clocks). In service since 1995, with no overlay.
Who calls from a 520 number
NANPA records the carrier each block of 520 numbers is assigned to. Of the 6.7 million 520 numbers assigned, 38% are with mobile carriers (Verizon Wireless, T-Mobile and AT&T Mobility); 34% with cable, internet-calling, business and other carriers (Onvoy and Bandwidth); 27% with local phone companies (Qwest (CenturyLink)).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Qwest (CenturyLink) | Landline | 26% |
| Verizon Wireless | Mobile | 15% |
| T-Mobile | Mobile | 14% |
| Onvoy | Cable, VoIP, other | 11% |
| AT&T Mobility | Mobile | 9% |
| Bandwidth | Cable, VoIP, other | 4% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 520
The 26 places with a telephone rate centre of their own using 520, largest first. Each links to its ZIP codes.
| Place | ZIP codes | Population |
|---|---|---|
| Tucson, AZ | 54 | 547,073 |
| Casa Grande, AZ | 4 | 60,905 |
| Sierra Vista, AZ | 4 | 45,155 |
| Nogales, AZ | 3 | 19,841 |
| Douglas, AZ | 3 | 15,981 |
| Benson, AZ | 1 | 5,417 |
| Bisbee, AZ | 1 | 4,977 |
| San Manuel, AZ | 1 | 3,491 |
| Sacaton, AZ | 1 | 3,429 |
| Willcox, AZ | 2 | 3,222 |
| Ajo, AZ | 1 | 3,107 |
| Superior, AZ | 1 | 2,535 |
| Blackwater, AZ | — | 1,958 |
| Sells, AZ | 1 | 1,935 |
| Pearce, AZ | 1 | 1,917 |
| Casa Blanca, AZ | — | 1,697 |
| Tombstone, AZ | 1 | 1,026 |
| Komatke, AZ | — | 809 |
| Santa Rosa, AZ | — | 615 |
| Bowie, AZ | 1 | 384 |
| Hayden, AZ | 1 | 331 |
| San Simon, AZ | 1 | 244 |
| Elfrida, AZ | 1 | 194 |
| Sunizona, AZ | — | 191 |
| Stotonic Village, AZ | — | 78 |
| Sasabe, AZ | 1 | 48 |
Nearby places using 520
These places have no rate centre of their own in NANPA's records; the nearest one uses 520. Near an area-code boundary that can be wrong for part of a town.
- San Tan Valley
- Casas Adobes
- Queen Creek
- Maricopa
- Marana
- Laveen
- Catalina Foothills
- Oro Valley
- Apache Junction
- Sahuarita
- Drexel Heights
- Florence
- Green Valley
- Rio Rico
- Eloy
- Coolidge
- Flowing Wells
- Vail
- Tanque Verde
- Valencia West
- Sierra Vista Southeast
- Sun Lakes
- Gold Canyon
- Saddlebrooke
- Tucson Estates
- Tucson Mountains
- Hereford
- Corona de Tucson
- Arizona City
- Picture Rocks
- Rincon Valley
- Catalina
- Avra Valley
- Three Points
- Fort Huachuca
- Summit
- South Tucson
- Red Rock
- Oracle
- Whetstone
- Bapchule
- Kearny
- Pirtleville
- Mescal
- Huachuca City
- Tubac
- Mammoth
- Ak-Chin Village
- Queen Valley
- St. David
- Mc Neal
- Cochise
- Naco
- Patagonia
- Maricopa Colony
- Gila Crossing
- Miracle Valley
- Dudleyville
- Sonoita
- Stanfield
ZIP codes in area code 520
140 ZIP codes in 67 towns, by the town each is mailed to, largest first. Each links to its own page.
- Tucson
- 85701, 85702, 85703, 85704, 85705, 85706, 85707, 85708, 85709, 85710, 85711, 85712, 85713, 85714, 85715, 85716, 85717, 85718, 85719, 85720, 85721, 85722, 85723, 85724, 85725, 85726, 85728, 85730, 85731, 85732, 85733, 85734, 85735, 85736, 85737, 85739, 85740, 85741, 85742, 85743, 85744, 85745, 85746, 85747, 85748, 85749, 85750, 85751, 85752, 85754, 85755, 85756, 85757, 85775
Where 520 numbers are issued
NANPA's rate centres with the most 520 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
TUCSON | Tucson | 399 |
SIERRAVIST | Sierra Vista | 70 |
CASAGRANDE | Casa Grande | 67 |
NOGALES | Nogales | 31 |
WILLCOX | Willcox | 18 |
BENSON | Benson | 12 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Pima County (68)
- Pinal County (32)
- Cochise County (26)
- Maricopa County (3)
- Santa Cruz County (9)
- Graham County (1)
- Gila County (1)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 520
Where is area code 520?
Area code 520 is in Arizona. It covers Tucson, San Tan Valley, Casas Adobes and 148 other places: 140 ZIP codes in Pima, Pinal, Cochise and 4 other counties.
What ZIP codes are in area code 520?
140 ZIP codes, by the town each is mailed to: Tucson (54, 85701 to 85775), San Tan Valley (3, 85140 to 85144), Queen Creek (85142), Maricopa (2, 85138 to 85139) and 63 more towns. The full list is on this page.
What time zone is area code 520 in?
Mountain time.
Is a 520 number a mobile or a landline?
It can be either. 38% of 520 numbers are assigned to mobile carriers and 27% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
Does a 520 number mean the caller is in Arizona?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 520 call can come from anywhere.
Other area codes in Arizona
All 5 Arizona area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 520.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/520
Underlying data is public domain or openly licensed — sources, vintages and licences.