Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KQ4DFX callsign genealogy
Currently held by FOSTER JR, WILLIAM
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 KQ4DFX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KQ4DFX.
- FOSTER JR, WILLIAMGAgranted 2022-09-15cancelled 2023-04-04