Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9JHK callsign genealogy
Currently held by KLABUNDE, GERALD G
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 K9JHK's current licensee, walking backwards.
- IRELAND, KARL ATXgranted 2018-06-12cancelled 2018-07-27
Successor callsigns
Callsigns held now by people who previously held K9JHK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9JHK, oldest first.
- KLABUNDE, GERALD G WI2005-01-14 → cancelled 2006-04-27
- IRELAND, KARL A TX2018-07-27 active