Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4DNX callsign genealogy
Currently held by COCHRAN, ROBERT L
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 W4DNX's current licensee, walking backwards.
- Cloud, Daniel CFLgranted 2018-05-01cancelled 2018-09-18
Successor callsigns
Callsigns held now by people who previously held W4DNX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4DNX, oldest first.
- COCHRAN, ROBERT L FL1991-03-05 → cancelled 1998-05-09
- Cloud, Daniel C FL2018-09-18 active