520 Area Code — AZ
Area code 520 serves AZ in the Mountain time zone, in service since 1995. The FCC has 197 unwanted-call complaints against 191 different 520 numbers on record. Look up the exact number that called you below.
Most-reported 520 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
520 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 520 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 520
- Serves
- AZ
- Time zone
- Mountain
- In service since
- 1995-03-19
- Overlay
- No
Source: NANPA numbering records, refreshed weekly.
Spam calls from 520? What to know
Seeing repeated missed calls from 520 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in AZ — spoofing software displays whatever digits the campaign chooses. Never call unknown numbers back; look them up first, and report unwanted calls to the FCC to build the public record.
Area code 520 FAQs
Where is area code 520?
Area code 520 serves AZ, in the Mountain time zone. It has been in service since 1995.
Why do I keep getting calls from 520 numbers?
Robocallers use "neighbor spoofing" — displaying a number with a local area code to make you more likely to answer. A call showing area code 520 may not originate from AZ at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 520 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 520 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 197 unwanted-call complaints against 191 distinct 520 numbers in our current data window. Check the specific number's report page before returning a missed call.