307 Area Code — WY
Area code 307 serves WY in the Mountain time zone, in service since 1947. The FCC has 59 unwanted-call complaints against 56 different 307 numbers on record. Look up the exact number that called you below.
Most-reported 307 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
307 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 307 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 307
- Serves
- WY
- Time zone
- Mountain
- In service since
- 1947-01-01
- Overlay
- No
Source: NANPA numbering records, refreshed weekly.
Spam calls from 307? What to know
Seeing repeated missed calls from 307 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in WY — 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 307 FAQs
Where is area code 307?
Area code 307 serves WY, in the Mountain time zone. It has been in service since 1947.
Why do I keep getting calls from 307 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 307 may not originate from WY at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 307 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 307 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 59 unwanted-call complaints against 56 distinct 307 numbers in our current data window. Check the specific number's report page before returning a missed call.