Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC4ZYD callsign genealogy
Currently held by HALSTEAD JR, HERMAN R
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 KC4ZYD's current licensee, walking backwards.
- KC4UNBno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KC4ZYD.
- HALSTEAD JR, HERMAN RVAgranted 2021-09-27