Phone Number Credit Score
Look up a number

Area code 520

Area code 520 Tucson, Arizona

Area code 520 is in Arizona, with numbers assigned in Tucson, Sierra Vista, Casa Grande and 25 more places. It’s 9:10 PM there now.

State
Arizona5 area codes in Arizona
Time zone
Mountain (no daylight saving)9:10 PM there now
Exchanges
69528 places
Overlay
NoneThe only code for its area
3 of 3 free lookups left today
  • No sign-up
  • We never contact the number
  • Spam risk included

Where area code 520 is

Numbers in 520 are assigned to 28 places in 9 counties: Pima County, Cochise County, Pinal County, Santa Cruz County, Gila County, Maricopa County, plus 3 more.

Tucson holds most of them: 58% of the exchanges.

  • Tucson400
  • Sierra Vista70
  • Casa Grande67
  • Nogales31
  • Willcox18
  • Benson12
  • Hayden9
  • Bisbee9
  • Douglas9
  • San Manuel8
  • Tombstone7
  • Superior7
  • Sacaton4
  • Sells3
  • Blackwater2
  • Casa Blanca2
  • Santa Rosa2
  • Ajo2
  • Komatke2
  • Yuma1
  • Stotonic Village1
  • Flagstaff1
  • Elfrida1
  • Sunizona1

Phone companies in 520

695 blocks of numbers in 520 are held by 48 phone companies. The most belong to Lumen (CenturyLink) (203), Verizon Wireless (104) and T-Mobile (95).

A mix: about 36% wireless, 32% local phone and cable and 31% other carriers, including internet phone services.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

520 went into service in 1995, added to the area of 602.

128 new exchanges were assigned since 2021, the latest in October 2026.

Calling 520

It’s 9:10 PM Mountain (no daylight saving) time in 520 right now; Arizona doesn’t change its clocks for daylight saving time.

From elsewhere in the U.S., dial 1, 520 and the 7-digit number.

Nearby area codes

Arizona has 5 area codes: 480, 520, 602, 623 and 928.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 520 area code

Map of the 520 area code around Tucson, Sierra Vista and Casa Grande, Arizona.

Interactive map © OpenStreetMap contributors

Cities on the map

More than three a day

Every plan includes caller ID lookups.

Caller ID and carrier lookups every month, plus full reports with the owner, their address and a real FICO® Score 4.

Basic

$29a month

Try it: $1 for 1 day

  • 100 caller ID & carrier lookups a month
  • 3 full reports a month
  • Owner, address and FICO® Score 4
  • Or $99 a year

$1 today, then $29/month after 1 day · cancel anytime

Most lookups

Platinum

$59a month

Try it: $1 for 7 days

  • 1,000 caller ID & carrier lookups a month
  • 5 full reports a month
  • Owner, address and FICO® Score 4
  • Or $199 a year

$1 today, then $59/month after 7 days · cancel anytime

Just one report

$19.99one time

No subscription

  • Who the number belongs to
  • Current address
  • FICO® Score 4 and credit profile

$19.99 once · nothing to cancel

You pick a plan after looking up a number. Full reports need a permissible purpose, like the person’s consent. Caller ID lookups past a plan’s monthly amount are 5¢ each; during a trial, up to 10 are included.

Questions about 520

Where is area code 520?

In Arizona, covering Tucson, Sierra Vista and Casa Grande and other places across 9 counties.

What time zone is 520 in?

Mountain (no daylight saving) time. It was 9:10 PM there when this page loaded.

Is 520 an overlay?

No. 520 is the only area code for its area right now.

Which phone companies have 520 numbers?

48 companies hold blocks; the most belong to Lumen (CenturyLink), Verizon Wireless and T-Mobile. About 36% of blocks are wireless.

Is 520 running out of numbers?

Not on record. 128 new exchanges have been assigned since 2021.