Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4AF callsign genealogy
Currently held by Sullivan, Joseph 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 KZ4AF's current licensee, walking backwards.
- Sullivan, Joseph LSCgranted 2023-07-11cancelled 2023-08-21
Successor callsigns
Callsigns held now by people who previously held KZ4AF.
No current licensee on record previously held this callsign.