Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TZK callsign genealogy
Currently held by Tenzyk, Michael
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 W4TZK's current licensee, walking backwards.
- Tenzyk, MichaelFLgranted 2011-05-26cancelled 2011-06-18
Successor callsigns
Callsigns held now by people who previously held W4TZK.
No current licensee on record previously held this callsign.