Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4RJL callsign genealogy
Currently held by Mill Creek Amateur Radio Club
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 KK4RJL's current licensee, walking backwards.
- KN4FONcancelledMill Creek Amateur Radio ClubGAgranted 2017-08-28cancelled 2018-02-23
Successor callsigns
Callsigns held now by people who previously held KK4RJL.
- Williams, Jonathan GGAgranted 2025-12-30
All historical holders
Every license row we've seen with the callsign KK4RJL, oldest first.
- Williams, Jonathan G GA2013-05-22 → cancelled 2016-02-02
- Mill Creek Amateur Radio Club GA2018-02-23 active