Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4BF callsign genealogy
Currently held by Guerrero, Mark
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 KZ4BF's current licensee, walking backwards.
- Guerrero, MarkVAgranted 2015-03-06cancelled 2023-10-11
Successor callsigns
Callsigns held now by people who previously held KZ4BF.
No current licensee on record previously held this callsign.