Confidence: Medium · Source: FCC ULS · As of 2026-09-15
W4CZR callsign genealogy
Currently held by COCHRAN, JOHN M
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 W4CZR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4CZR.
No current licensee on record previously held this callsign.