Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4RP callsign genealogy
Currently held by WILLIAMS, CRAIG
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KM4RP's current licensee, walking backwards.
- Williams, Michael CSCgranted 2015-02-13cancelled 2015-03-07
Successor callsigns
Callsigns held now by people who previously held KM4RP.
- WILLIAMS, CRAIGSCgranted 2024-07-26
All historical holders
Every license row we've seen with the callsign KM4RP, oldest first.
- WILLIAMS, CRAIG SC1999-04-29 → cancelled 2011-04-30
- WILLIAMS, CRAIG SC2015-03-07 → cancelled 2024-07-26