Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WK9U callsign genealogy
Currently held by LESLIE, JASON
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 WK9U's current licensee, walking backwards.
- LESLIE, JASONWIgranted 2013-04-05cancelled 2013-12-20
Successor callsigns
Callsigns held now by people who previously held WK9U.
- OTTO, LESLIE SILgranted 2021-12-10
All historical holders
Every license row we've seen with the callsign WK9U, oldest first.
- OTTO, LESLIE S IL2009-10-15 → cancelled 2011-11-29
- LESLIE, JASON WI2024-05-07 active