Confidence: Medium · Source: FCC ULS · As of 2026-09-15
WA9SHM callsign genealogy
Currently held by Kosater, Joseph M
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 WA9SHM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WA9SHM.
No current licensee on record previously held this callsign.