517 Area Code — MI
Area code 517 serves MI in the Eastern time zone, in service since 1947. The FCC has 85 unwanted-call complaints against 75 different 517 numbers on record. Look up the exact number that called you below.
Most-reported 517 numbers
Ranked by FCC unwanted-call complaints. Click a number for its full report.
517 unwanted-call complaints, last 12 months
Monthly FCC complaint volume against 517 numbers. Spikes usually mark an active robocall campaign cycling through the code.
Carriers operating in 517
Carriers assigned to 517 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.
- COMCAST IP PHONE, LLCC · 1 prefix
About area code 517
- Serves
- MI
- Time zone
- Eastern
- In service since
- 1947-01-01
- Overlay
- No
Source: NANPA numbering records, refreshed weekly.
Spam calls from 517? What to know
Seeing repeated missed calls from 517 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in MI — 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 517 FAQs
Where is area code 517?
Area code 517 serves MI, in the Eastern time zone. It has been in service since 1947.
Why do I keep getting calls from 517 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 517 may not originate from MI at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 517 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 517 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 85 unwanted-call complaints against 75 distinct 517 numbers in our current data window. Check the specific number's report page before returning a missed call.