Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KU1L callsign genealogy
Currently held by Jackson, Michael 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 KU1L's current licensee, walking backwards.
- Jackson, Michael LMAgranted 2024-02-22cancelled 2025-07-08
Successor callsigns
Callsigns held now by people who previously held KU1L.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KU1L, oldest first.
- POLOWY, LAWRENCE S CT2013-03-14 → cancelled 2025-06-10
- Jackson, Michael L MA2025-07-08 active