Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JCR callsign genealogy
Currently held by RUNSKI, JOHN C
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 K4JCR's current licensee, walking backwards.
- RUNSKI, JOHN CNCgranted 2012-03-12cancelled 2012-04-03
Successor callsigns
Callsigns held now by people who previously held K4JCR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JCR, oldest first.
- SHOPE, WILLIAM F NC1998-03-16 → cancelled 2010-03-17
- RUNSKI, JOHN C NC2022-01-08 active