623 Area Code — Scam Calls, Location & Who's Calling
Area code 623 serves Arizona in the Mountain time zone, in service since 1999. The FCC has 2,081 unwanted-call complaints against 1,532 different 623 numbers on record. Look up the exact number that called you below.
Most-reported 623 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
- (623) 745-••••56 complaints · 2016-09-28
- (623) 295-••••39 complaints · 2015-12-17
- (623) 696-••••24 complaints · 2017-04-13
- (623) 499-••••19 complaints · 2018-06-07
- (623) 537-••••15 complaints · 2018-08-07
- (623) 850-••••15 complaints · 2017-04-20
- (623) 533-••••14 complaints · 2016-03-08
- (623) 696-••••13 complaints · 2016-11-17
- (623) 878-••••12 complaints · 2017-05-01
- (623) 875-••••12 complaints · 2017-01-23
- (623) 745-••••10 complaints · 2019-09-26
- (623) 498-••••10 complaints · 2018-12-21
- (623) 432-••••10 complaints · 2016-06-07
- (623) 900-••••10 complaints · 2015-10-22
- (623) 476-••••9 complaints · 2020-08-10
- (623) 537-••••9 complaints · 2018-08-03
- (623) 492-••••8 complaints · 2023-08-25
- (623) 707-••••8 complaints · 2020-05-16
- (623) 537-••••8 complaints · 2018-08-07
- (623) 584-••••8 complaints · 2017-07-31
- (623) 226-••••8 complaints · 2017-07-14
- (623) 552-••••7 complaints · 2019-11-16
- (623) 748-••••7 complaints · 2018-02-02
- (623) 745-••••6 complaints · 2018-02-05
- (623) 546-••••6 complaints · 2017-12-06
623 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 623 numbers. Spikes usually mark an active robocall campaign cycling through the code.
Carriers operating in 623
Carriers assigned to 623 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.
- QWEST CORPORATIONI · 15 prefixes
- T-MOBILE USA, INC.Wireless · 6 prefixes
- NEW CINGULAR WIRELESS PCS, LLCWireless · 6 prefixes
- MCIMETRO ACCESS TRANSMISSION SERVICES LLCC · 4 prefixes
- CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZWireless · 3 prefixes
- ONVOY, LLC - AZC · 3 prefixes
- LEVEL 3 COMMUNICATIONS, LLC - AZC · 3 prefixes
- TELEPORT COMMUNICATIONS AMERICA, LLC - AZC · 2 prefixes
About area code 623
- Serves
- Arizona
- Time zone
- Mountain
- In service since
- 1999-03-01
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 623? What to know
Seeing repeated missed calls from 623 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in Arizona — 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 623 FAQs
Where is area code 623?
Area code 623 serves Arizona, in the Mountain time zone. It is part of an overlay complex, so multiple area codes serve the same territory and 10-digit dialing is required. It has been in service since 1999.
Why do I keep getting calls from 623 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 623 may not originate from Arizona at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 623 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 623 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 2,081 unwanted-call complaints against 1,532 distinct 623 numbers in our current data window. Check the specific number's report page before returning a missed call.