557 Area Code — MO
Area code 557 serves MO in the Central time zone, in service since 2022. The FCC has 7 unwanted-call complaints against 7 different 557 numbers on record. Look up the exact number that called you below.
Reported 557 numbers
No 557 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.
557 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 557 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 557
- Serves
- MO
- Time zone
- Central
- In service since
- 2022-08-12
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 557? What to know
Seeing repeated missed calls from 557 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in MO — 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 557 FAQs
Where is area code 557?
Area code 557 serves MO, 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 2022.
Why do I keep getting calls from 557 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 557 may not originate from MO at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 557 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 557 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 7 unwanted-call complaints against 7 distinct 557 numbers in our current data window. Check the specific number's report page before returning a missed call.