Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4ZC callsign genealogy
Currently held by BLOCKER, MIKE 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 AB4ZC's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AB4ZC.
No current licensee on record previously held this callsign.