Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TZM callsign genealogy
Currently held by MITCHELL III, THOMAS Z
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 W4TZM's current licensee, walking backwards.
- MITCHELL III, THOMAS ZNCgranted 2011-02-14cancelled 2011-04-01
Successor callsigns
Callsigns held now by people who previously held W4TZM.
- MITCHELL III, THOMAS ZNCgranted 2025-11-27