520 Area Code — Arizona
520 is a North American Numbering Plan area code for Arizona, the United States. It covers about 1,828,756 people in 67 towns and 140 ZIP codes, including Tucson, San Tan Valley and Queen Creek.
| Field | Value |
|---|---|
| Area code | 520 |
| Country | United States (+1) |
| State / province | Arizona |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Mountain (no DST) |
| Population covered | 1,828,756 |
| Towns covered | 67 |
| ZIP codes | 140 |
| Approx. centre | 32.271, -110.913 |
Where area code 520 is used
Area code 520 is assigned to Arizona, the United States, inside the North American Numbering Plan. Numbers in the code are written (520) NXX-XXXX at home and +1 520 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 520
The 67 towns below are the largest in the 520 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Tucson | Pima County | 924,030 | 54 |
| San Tan Valley | Pinal County | 95,704 | 3 |
| Queen Creek | Pinal County | 93,700 | 1 |
| Maricopa | Pinal County | 76,044 | 2 |
| Casa Grande | Pinal County | 73,819 | 4 |
| Apache Junction | Pinal County | 56,611 | 4 |
| Laveen | Maricopa County | 54,641 | 1 |
| Sierra Vista | Cochise County | 49,069 | 4 |
| Marana | Pima County | 39,625 | 2 |
| Florence | Pinal County | 38,671 | 1 |
| Vail | Pima County | 34,752 | 1 |
| Green Valley | Pima County | 31,899 | 2 |
Counties covered
| County | ZIP codes |
|---|---|
| Pima County | 68 |
| Pinal County | 32 |
| Cochise County | 26 |
| Santa Cruz County | 9 |
| Maricopa County | 3 |
| Gila County | 1 |
| Graham County | 1 |
Nearby area codes
How to dial area code 520
- Within North America: 520 + 7-digit number (520-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 520, then the 7-digit number — for example 00 1 520 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 520?
520 is a North American Numbering Plan area code assigned to Arizona, the United States. It covers about 1,828,756 people in 67 towns.
Is 520 a US or Canadian area code?
520 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 520 in?
Area code 520 is in the Mountain (no DST) time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.