Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JLK callsign genealogy
Currently held by SCHAFF, CHARLES J
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 K4JLK's current licensee, walking backwards.
- Kanne, Judith LGAgranted 2009-11-13cancelled 2009-12-01
Successor callsigns
Callsigns held now by people who previously held K4JLK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JLK, oldest first.
- SCHAFF, CHARLES J FL1997-08-27 → cancelled 2009-08-28
- Kanne RN, Judith L GA2019-10-01 active