720 Area Code — CO
Area code 720 serves CO in the Mountain time zone, in service since 1998. The FCC has 271 unwanted-call complaints against 258 different 720 numbers on record. Look up the exact number that called you below.
Most-reported 720 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
- (720) 897-07784 complaints · 2026-01-27
- (720) 679-04073 complaints · 2026-06-24
- (720) 605-58233 complaints · 2025-08-05
- (720) 452-91852 complaints · 2026-05-20
- (720) 248-69032 complaints · 2026-05-19
- (720) 861-75292 complaints · 2026-04-10
- (720) 734-68622 complaints · 2026-03-30
- (720) 449-16122 complaints · 2026-03-09
- (720) 792-07812 complaints · 2025-08-26
720 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 720 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 720
- Serves
- CO
- Time zone
- Mountain
- In service since
- 1998-06-01
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 720? What to know
Seeing repeated missed calls from 720 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in CO — 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 720 FAQs
Where is area code 720?
Area code 720 serves CO, 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 1998.
Why do I keep getting calls from 720 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 720 may not originate from CO at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 720 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 720 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 271 unwanted-call complaints against 258 distinct 720 numbers in our current data window. Check the specific number's report page before returning a missed call.