650 Area Code — CA
Area code 650 serves CA in the Pacific time zone, in service since 1997. The FCC has 120 unwanted-call complaints against 99 different 650 numbers on record. Look up the exact number that called you below.
Most-reported 650 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
650 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 650 numbers. Spikes usually mark an active robocall campaign cycling through the code.
Carriers operating in 650
Carriers assigned to 650 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.
- BANDWIDTH.COM CLEC, LLC - CAC · 1 prefix
- LEVEL 3 COMMUNICATIONS, LLC - CAC · 1 prefix
About area code 650
- Serves
- CA
- Time zone
- Pacific
- In service since
- 1997-08-02
- Overlay
- No
Source: NANPA numbering records, refreshed weekly.
Spam calls from 650? What to know
Seeing repeated missed calls from 650 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in CA — 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 650 FAQs
Where is area code 650?
Area code 650 serves CA, in the Pacific time zone. It has been in service since 1997.
Why do I keep getting calls from 650 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 650 may not originate from CA at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 650 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 650 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 120 unwanted-call complaints against 99 distinct 650 numbers in our current data window. Check the specific number's report page before returning a missed call.