Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO3L callsign genealogy
Currently held by Voit, Edward F
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 KO3L's current licensee, walking backwards.
- MARR JR, HARRY EMDgranted 2014-08-30cancelled 2020-06-01
Successor callsigns
Callsigns held now by people who previously held KO3L.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO3L, oldest first.
- Voit, Edward F PA2008-03-26 → cancelled 2020-04-23
- MARR JR, HARRY E MD2020-06-01 active