Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4JJK callsign genealogy
Currently held by KRIEGSHAUSER JR, JAMES 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 WB4JJK's current licensee, walking backwards.
- KRIEGSHAUSER JR, JAMES JTXgranted 2017-03-10cancelled 2017-03-31
Successor callsigns
Callsigns held now by people who previously held WB4JJK.
No current licensee on record previously held this callsign.