Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB9JSO callsign genealogy
Currently held by REDENBAUGH, HOWARD W
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 WB9JSO's current licensee, walking backwards.
- REDENBAUGH, MIKE GILgranted 2013-05-03cancelled 2013-09-07
Successor callsigns
Callsigns held now by people who previously held WB9JSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB9JSO, oldest first.
- REDENBAUGH, HOWARD W IL1996-03-26 → cancelled 2000-11-28
- REDENBAUGH, MIKE G FL2023-06-27 active