Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5IRF callsign genealogy
Currently held by WILLIAMSON, STEPHEN B
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 K5IRF's current licensee, walking backwards.
- WILLIAMSON, STEPHEN BTXgranted 2014-01-15cancelled 2017-08-08
Successor callsigns
Callsigns held now by people who previously held K5IRF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5IRF, oldest first.
- WILLIAMSON, TROY D TX2006-06-02 → cancelled 2015-08-18
- WILLIAMSON, STEPHEN B TX2017-08-08 active