Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4RIO callsign genealogy
Currently held by Cain Jr, Lee 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 W4RIO's current licensee, walking backwards.
- Vail II, Daniel PWAgranted 2015-08-05cancelled 2015-10-03
Successor callsigns
Callsigns held now by people who previously held W4RIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4RIO, oldest first.
- Cain Jr, Lee R FL2005-08-05 → cancelled 2013-09-13
- Vail II, Daniel P WA2026-02-13 active