Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ENV callsign genealogy
Currently held by Fernandez, Walter H
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 K4ENV's current licensee, walking backwards.
- Fernandez, Walter HFLgranted 2014-09-29cancelled 2018-05-11
Successor callsigns
Callsigns held now by people who previously held K4ENV.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ENV, oldest first.
- MUENCH, BILLY D FL1989-11-07 → cancelled 2002-03-07
- Fernandez, Walter H FL2018-05-11 active