Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB3KOI callsign genealogy
Currently held by Kolesar, Jeffrey C
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 KB3KOI's current licensee, walking backwards.
- Starkweather, Donald CPAgranted 2016-04-13cancelled 2016-05-10
Successor callsigns
Callsigns held now by people who previously held KB3KOI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB3KOI, oldest first.
- Kolesar, Jeffrey C PA2003-12-10 → cancelled 2015-12-11
- Starkweather, Donald C MI2016-05-10 active