Area Code 520
Arizona
Geographic Coverage
State
AZ
Major Cities
- Tucson
- Goodyear
- Avondale
- Casas Adobes
- Maricopa
- Casa Grande
- Marana
- Catalina Foothills
- Oro Valley
- Sierra Vista
- Sahuarita
- Drexel Heights
- Florence
- Rio Rico
- Green Valley
- Nogales
- Flowing Wells
- Eloy
- Douglas
- Vail
- Tanque Verde
- Coolidge
- Sierra Vista Southeast
- Valencia West
and 110 more cities
Time Zone
- Mountain Time (MT)
Current Time
Demographics & Economics
- Total Population
- 1,737,891
- Population Density
- 79 people/sq mibelow U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $67,929below U.S. median (U.S.: $78,538)
- Poverty Rate
- 13.8%above U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 6.0%above U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+31.9%near U.S. average (U.S.: 35.0%)High School or Lower28.0%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Split Area Code
This area code was created by splitting an existing area code into separate geographic regions. When a split occurs, some customers in the original area code region are assigned the new area code.
This area code was split from area code 602.
This area code was later split into area code 928.
In service since: 19-Mar-1995
Call Context
This area code includes Tucson and surrounding communities in Arizona. It was created as a geographic split from area code 602, dividing the original territory into separate numbering regions.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 520).
| County | Population | Share |
|---|---|---|
| Pima, AZ | 1,073,726 | 61.8% |
| Pinal, AZ | 367,953 | 21.2% |
| Cochise, AZ | 120,011 | 6.9% |
| Maricopa, AZ | 99,259 | 5.7% |
| Santa Cruz, AZ | 74,699 | 4.3% |
| Gila, AZ | 2,243 | 0.1% |
Nearby Area Codes
Area codes geographically closest to 520.
Frequently Asked Questions
Common questions about area code 520 and how phone numbering works.
Phone numbers are assigned based on where the number was originally provisioned, not the caller's current location. Mobile phones retain their number when users move, and businesses may use numbers from regions where they don't have a physical presence. VoIP services can also provision numbers from virtually any area code.
Yes, mobile phones can have numbers from any area code in the region they were activated. Wireless carriers assign numbers from available pools regardless of phone type. When users change carriers or move to new areas, they typically keep their original number, which may have a different area code than their current location.
Start by looking up the area code on this site to understand its general geographic region. For the specific number, options include using your carrier's caller ID features or checking public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register your number with the National Do Not Call Registry to reduce unwanted calls. Keep in mind that caller ID can display any name the caller chooses to set.
Area codes are sometimes "split" when an existing code runs out of available number combinations. In a split, the original territory is divided geographically, with each portion receiving its own area code. This differs from an overlay, where multiple codes share the same territory. See our guide on splits and overlays for details.
While Tucson is a prominent city in this area code's coverage, the code serves the broader surrounding region as well. Area codes are assigned geographically and typically cover multiple cities, towns, and communities beyond any single anchor city.