Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ZYZ callsign genealogy
Currently held by WALKER, MICHAEL E
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 W4ZYZ's current licensee, walking backwards.
- WALKER, MICHAEL ETNgranted 2022-12-06cancelled 2022-12-30
Successor callsigns
Callsigns held now by people who previously held W4ZYZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4ZYZ, oldest first.
- GREGORY, WARREN A SC2006-03-23 → cancelled 2018-06-19
- WALKER, MICHAEL E TN2022-12-30 active