Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ENV callsign genealogy
Currently held by GUYER, THOMAS F
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 W4ENV's current licensee, walking backwards.
- GUYER, THOMAS FFLgranted 2003-12-11cancelled 2012-08-28
Successor callsigns
Callsigns held now by people who previously held W4ENV.
- GUYER, THOMAS FCAgranted 2022-12-23