Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WY9U callsign genealogy
Currently held by KARL, SHANE L
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 WY9U's current licensee, walking backwards.
- KARL, SHANE LTXgranted 2014-02-11cancelled 2014-04-05
Successor callsigns
Callsigns held now by people who previously held WY9U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WY9U, oldest first.
- JACKOWIAK, FRANK E IL2000-11-10 → cancelled 2013-02-06
- KARL, SHANE L KS2024-06-04 active