Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC5BYU callsign genealogy
Currently held by THOMAS SR, DENNIS R
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 KC5BYU's current licensee, walking backwards.
- Sitton, Robert SARgranted 2026-03-18cancelled 2026-05-01
Successor callsigns
Callsigns held now by people who previously held KC5BYU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5BYU, oldest first.
- THOMAS SR, DENNIS R LA1993-08-10 → cancelled 2005-08-11
- Keith, Donald E TX2007-04-17 → cancelled 2019-04-18
- Sitton, Robert S AR2026-05-01 active