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US area code · Arizona

Area code 520

Where the 520 area code is, its overlay and how to dial a +1 520 number from anywhere.

CoversCasa Grande, ArizonaTime zoneMountain (MT)TypeGeographic
Quick answer

The 520 area code is in Casa Grande, Arizona, United States (Mountain (MT)). To call from abroad: +1 520 555-0123.

StateArizona
Main areaCasa Grande
Time zoneMountain (MT)
TypeGeographic
10-digit dialingRequired
In service since21-Jan-1994

The 520 area code is a geographic North American Numbering Plan (NANP) code covering Casa Grande, Arizona. It has been in service since 21-Jan-1994 and sits in the Mountain (MT) time zone.

How to dial a 520 number

From abroad+1 520 555-0123
Within the US / Canada1 520 555-0123
Locally (same area)520 555-0123

Cities in the 520 area code

A 520 number is usually in one of these places in Arizona — 4 counties.

Casa Grande PinalCatalina FoothillsDrexel HeightsNogales Santa CruzOro ValleySierra Vista CochiseTucson Pima

Other Arizona area codes

480602623928

Frequently asked questions

Where is the 520 area code?

The 520 area code is in Casa Grande, Arizona, United States (Mountain (MT)).

Do I have to dial 10 digits for 520?

Yes — dial the area code plus the seven-digit number.

How do I call a 520 number from another country?

Dial your exit code (or +), then 1, then 520, then the number: +1 520 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 520 number does not pinpoint a street or ZIP code.

Missed a call from +1 520?

In the 30 days to September 24, 2026, 1,486 unwanted calls showing a 520 number were reported to the US Federal Trade Commission, 74% of them recorded messages or robocalls. That puts 520 at #12 of 670 area codes reported.

Other608
Reducing your debt (credit cards, mortgage, student loans)447
Calls pretending to be government, businesses, or family and friends141
Medical & prescriptions73
Before you call back
  • If you do not know anyone in Arizona, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 520 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 520 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 520:

Qwest Corporation 201Cellco Partnership Dba Verizon Wireless 104T-Mobile USA, Inc. 84New Cingular Wireless PCS, LLC 53Onvoy, LLC 47Mcimetro Access Transmission Services LLC 24

About 34.1% of the 709 prefixes in use belong to mobile carriers: a 520 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 520 — cities & rate centres