Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF0W callsign genealogy
Currently held by Patin, Sidney L
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 KF0W's current licensee, walking backwards.
- Patin, Sidney LCOgranted 2002-12-20cancelled 2006-06-27
Successor callsigns
Callsigns held now by people who previously held KF0W.
- ALLEN JR, WILLIAM CCOgranted 2021-12-23
All historical holders
Every license row we've seen with the callsign KF0W, oldest first.
- ALLEN JR, WILLIAM C CO1995-09-26 → cancelled 2002-03-20
- Patin, Sidney L CO2026-04-02 active