Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W5MUU callsign genealogy
Currently held by RIDDLE, JOHNNIE 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 W5MUU's current licensee, walking backwards.
- Riddle, Johnnie RTXgranted 2014-07-09cancelled 2014-08-19
Successor callsigns
Callsigns held now by people who previously held W5MUU.
No current licensee on record previously held this callsign.