Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SFA callsign genealogy
Currently held by HAY, FRED W
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 K4SFA's current licensee, walking backwards.
- HAY, FRED WFLgranted 1998-03-09cancelled 2007-05-01
Successor callsigns
Callsigns held now by people who previously held K4SFA.
No current licensee on record previously held this callsign.