Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9SBT callsign genealogy
Currently held by Coombs Jr, Donald 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 K9SBT's current licensee, walking backwards.
- Coombs Jr, Donald RCAgranted 2007-11-27cancelled 2007-12-18
Successor callsigns
Callsigns held now by people who previously held K9SBT.
No current licensee on record previously held this callsign.