Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA9SBM callsign genealogy
Currently held by MARTENS SR, JACK R
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 KA9SBM's current licensee, walking backwards.
- MINER, STEVEN BILgranted 2006-12-19cancelled 2016-10-07
Successor callsigns
Callsigns held now by people who previously held KA9SBM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA9SBM, oldest first.
- MARTENS SR, JACK R IL1994-10-03 → cancelled 2006-10-04
- MINER, STEVEN B IL2016-10-07 active