983 Area Code — CO
Area code 983 serves CO in the Mountain time zone, in service since 2022. The FCC has 30 unwanted-call complaints against 29 different 983 numbers on record. Look up the exact number that called you below.
Most-reported 983 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
983 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 983 numbers. Spikes usually mark an active robocall campaign cycling through the code.
About area code 983
- Serves
- CO
- Time zone
- Mountain
- In service since
- 2022-06-17
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 983? What to know
Seeing repeated missed calls from 983 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in CO — 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 983 FAQs
Where is area code 983?
Area code 983 serves CO, in the Mountain 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 983 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 983 may not originate from CO at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 983 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 983 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 30 unwanted-call complaints against 29 distinct 983 numbers in our current data window. Check the specific number's report page before returning a missed call.