Area Code Box

Area code 520

Where is area code 520?

Tucson, Sierra Vista and Casa Grande, Arizona

Local time: … (Mountain Standard Time)

StateArizona
CountryUnited States
Main citiesTucson, Sierra Vista and Casa Grande
Time zoneMountain Standard Time
Overlay area codesNone
In service since1995 (created from 602)
Assigned prefixes695
Dialing format(520) XXX-XXXX · +1 520 XXX XXXX from abroad

Look up a 520 number

Enter a 3-digit area code or a full 10-digit number.

Cities and towns in area code 520

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 520.

Phone companies in area code 520

The carriers that hold the most 520 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

PrefixesCarrier
200Qwest (Lumen)
104Verizon Wireless
84T-Mobile USA
53New Cingular Wireless PCS (AT&T)
47Onvoy
26Mcimetro Access Transmission Services
17Level 3 Communications
17Bandwidth.com CLEC

All 695 prefixes in area code 520

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Questions

Where is area code 520?
Area code 520 is in Arizona. It serves Tucson, Sierra Vista, Casa Grande, Nogales and Willcox and 40 other cities and towns.
What time zone is area code 520 in?
Area code 520 uses Mountain Standard Time.
Is a call from area code 520 a scam?
The area code alone doesn’t tell you. Most calls from 520 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 520 number, let it go to voicemail.
When did area code 520 start?
520 went into service in 1995. It was created from area code 602.
Can a 520 number be outside Arizona?
Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 520 caller can be anywhere.

Other area codes in Arizona

Area codeMain cities
480Phoenix, Scottsdale and Mesa
602Phoenix and Glendale
623Phoenix, Glendale and Buckeye
928Yuma, Flagstaff and Prescott