Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MJK callsign genealogy
Currently held by Krueger, Michael 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 K9MJK's current licensee, walking backwards.
- Krueger, Michael JILgranted 2014-05-14cancelled 2014-06-17
Successor callsigns
Callsigns held now by people who previously held K9MJK.
No current licensee on record previously held this callsign.