Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG4KTM callsign genealogy
Currently held by Harmon, William K
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 KG4KTM's current licensee, walking backwards.
- Harmon, William KKYgranted 2001-01-09cancelled 2009-01-21
Successor callsigns
Callsigns held now by people who previously held KG4KTM.
- Harmon, William KKYgranted 2001-01-09cancelled 2009-01-21
All historical holders
Every license row we've seen with the callsign KG4KTM, oldest first.
- Harmon, William K KY2000-12-12 → cancelled 2001-01-09
- Harmon, William K CA2019-09-04 active