Cities in area code 520
These are the cities and communities covered by 520 in Arizona. "Covered" means the locality is a rate center holding 520 prefixes; the largest are Tucson, Sierra Vista, Casa Grande.
By numbering footprint the leading localities are Tucson, Sierra Vista, Casa Grande, Nogales, Willcox, Benson, Hayden and Bisbee, and 28 smaller communities down to single-prefix localities. Prefix counts track lines in service, so the ranking is a reasonable proxy for where the code's subscribers actually are.
20 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.
4 of these localities are also reachable through other area codes — overlay territory where the same place answers to several codes.
All of the code's territory keeps Mountain time.
Remember that people keep numbers when they relocate, so a 520 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Tucson | 398 | Phoenix-Mesa-Chandler, AZ | 520 |
| Sierra Vista | 70 | — | 520 |
| Casa Grande | 66 | Phoenix-Mesa-Chandler, AZ | 520 |
| Nogales | 31 | — | 520 |
| Willcox | 18 | — | 520 |
| Benson | 12 | — | 520 |
| Hayden | 9 | Phoenix-Mesa-Chandler, AZ | 520 |
| Bisbee | 9 | — | 520 |
| Douglas | 9 | — | 520 |
| San Manuel | 8 | Phoenix-Mesa-Chandler, AZ | 520 |
| Tombstone | 7 | — | 520 |
| Whitlow | 7 | Phoenix-Mesa-Chandler, AZ | 520 |
| Superior | 7 | Phoenix-Mesa-Chandler, AZ | 520 |
| Sacaton | 4 | Phoenix-Mesa-Chandler, AZ | 520 |
| Sells | 3 | Tucson, AZ | 520 |
| Sasabe | 3 | Tucson, AZ | 520 |
| Cascabel | 2 | Tucson, AZ | 520 |
| Blackwater | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Casa Blanca | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Santa Rosa | 2 | Tucson, AZ | 520 |
| Ajo | 2 | Tucson, AZ | 520 |
| Maricopa Village | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Komatke | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Portal | 2 | — | 520 |
| Lone Butte | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Silver Bell | 2 | Phoenix-Mesa-Chandler, AZ | 520 |
| Yuma | 1 | — | 520, 928 |
| West San Simon | 1 | Phoenix-Mesa-Chandler, AZ | 520 |
| Stotonic | 1 | Phoenix-Mesa-Chandler, AZ | 520 |
| Flagstaff | 1 | — | 520, 928 |
| Elfrida | 1 | — | 520 |
| Sunizona | 1 | — | 520 |
| Pearce | 1 | — | 520 |
| Prescott | 1 | — | 520, 928 |
| San Simon | 1 | — | 520 |
| Bowie | 1 | — | 520 |
| Sedona | 1 | — | 520, 928 |
FAQ
What is the biggest city in area code 520?
Tucson holds the most active prefixes (398), making it the code's largest numbering locality.
How many places does 520 cover?
37 rate centers in Arizona hold active 520 prefixes, from Tucson down to communities with a single prefix.
Does a 520 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.