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US area code · Arizona

520 area code

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.

Number holders in area code 520

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 709 prefixes are in use in 520, shared by 55 companies. The largest holders:

CompanyPrefixesShare
Qwest Corporation20128%
Cellco Partnership Dba Verizon Wireless10415%
T-Mobile USA, Inc.8412%
New Cingular Wireless PCS, LLC537%
Onvoy, LLC477%
Mcimetro Access Transmission Services LLC243%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 520 numbers

Reports to the FTC, last 30 days
1,486
Recorded messages or robocalls
74%
Rank among area codes
#12 of 670
Most reported subjects
Other (608)
Reducing your debt (credit cards, mortgage, student loans) (447)
Calls pretending to be government, businesses, or family and friends (141)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

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

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