Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5WTC callsign genealogy
Currently held by Hallum, Randal S
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 W5WTC's current licensee, walking backwards.
- Hallum, Randal SOKgranted 2015-01-02cancelled 2016-06-07
Successor callsigns
Callsigns held now by people who previously held W5WTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5WTC, oldest first.
- Shelhamer, Dustin P TX2002-03-07 → cancelled 2014-03-08
- Hallum, Randal S OK2026-04-14 active