621 Area Code — TX
Area code 621 serves TX in the Central time zone, in service since 2025. Look up the exact number that called you below.
Reported 621 numbers
No 621 numbers currently pass our complaint threshold. Look up the exact number that called you — the lookup works on every US number, whether or not it has complaint history.
About area code 621
- Serves
- TX
- Time zone
- Central
- In service since
- 2025-01-23
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 621? What to know
Seeing repeated missed calls from 621 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in TX — 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 621 FAQs
Where is area code 621?
Area code 621 serves TX, in the Central 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 2025.
Why do I keep getting calls from 621 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 621 may not originate from TX at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 621 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 621 contains millions of legitimate lines alongside any spoofed or spam numbers. Check the specific number's report page before returning a missed call.