Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM5CF callsign genealogy
Currently held by Farmer, Charles D
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 KM5CF's current licensee, walking backwards.
- Farmer, Charles DMSgranted 2025-05-20cancelled 2025-08-09
Successor callsigns
Callsigns held now by people who previously held KM5CF.
- HEIN, WILLIAM ATXgranted 2020-06-19
All historical holders
Every license row we've seen with the callsign KM5CF, oldest first.
- HEIN, WILLIAM A TX1996-07-29 → cancelled 2000-09-06
- Farmer, Charles D MS2025-08-09 active