Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TZU callsign genealogy
Currently held by STARNES, SHERMAN 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 W4TZU's current licensee, walking backwards.
- SMITH, MICHAEL TFLgranted 2021-03-15cancelled 2025-06-06
Successor callsigns
Callsigns held now by people who previously held W4TZU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4TZU, oldest first.
- STARNES, SHERMAN R FL1995-04-19 → cancelled 2007-04-20
- SMITH, MICHAEL T FL2025-06-06 active