857 Area Code — MA
Area code 857 serves MA in the Eastern time zone, in service since 2001. The FCC has 130 unwanted-call complaints against 124 different 857 numbers on record. Look up the exact number that called you below.
Most-reported 857 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
857 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 857 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 857
- Serves
- MA
- Time zone
- Eastern
- In service since
- 2001-05-02
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 857? What to know
Seeing repeated missed calls from 857 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in MA — 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 857 FAQs
Where is area code 857?
Area code 857 serves MA, in the Eastern 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 2001.
Why do I keep getting calls from 857 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 857 may not originate from MA at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 857 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 857 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 130 unwanted-call complaints against 124 distinct 857 numbers in our current data window. Check the specific number's report page before returning a missed call.