Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK3O callsign genealogy
Currently held by Toth, Michael 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 KK3O's current licensee, walking backwards.
- Munck, Gordon WORgranted 2015-02-25cancelled 2015-10-14
Successor callsigns
Callsigns held now by people who previously held KK3O.
- GROVES, GORDON CFLgranted 2006-09-13cancelled 2018-11-06
All historical holders
Every license row we've seen with the callsign KK3O, oldest first.
- Toth, Michael C CA2003-09-23 → cancelled 2015-09-24
- Munck, Gordon W OR2025-08-01 active