Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ETB callsign genealogy
Currently held by THOMPSON, BETTY 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 K4ETB's current licensee, walking backwards.
- Riley Sr, William BSCgranted 2018-10-15cancelled 2018-11-16
Successor callsigns
Callsigns held now by people who previously held K4ETB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ETB, oldest first.
- THOMPSON, BETTY S SC1997-10-01 → cancelled 2009-10-02
- Riley Sr, William B SC2018-11-16 active