Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9KDX callsign genealogy
Currently held by ROBERTSON, GILBERT E
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 K9KDX's current licensee, walking backwards.
- RICHARDS, WILLIAM BILgranted 2005-09-30cancelled 2013-06-21
Successor callsigns
Callsigns held now by people who previously held K9KDX.
- ROBERTSON, GILBERT EILgranted 1999-11-04cancelled 2000-07-28
All historical holders
Every license row we've seen with the callsign K9KDX, oldest first.
- ROBERTSON, GILBERT E IL1998-05-06 → cancelled 1999-11-04
- RICHARDS, WILLIAM B IL2024-06-26 active