Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4CDR callsign genealogy
Currently held by Randolph, Clinton D
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 WB4CDR's current licensee, walking backwards.
- Randolph, Clinton DFLgranted 2023-03-28cancelled 2024-02-27
Successor callsigns
Callsigns held now by people who previously held WB4CDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4CDR, oldest first.
- Mock, Evan Y FL2007-01-22 → cancelled 2019-03-13
- Randolph, Clinton D FL2024-02-27 active