Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0BT callsign genealogy
Currently held by ARMSTRONG, ROBERT W
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 K0BT's current licensee, walking backwards.
- ARMSTRONG SR, ROBERT WAZgranted 2004-09-10cancelled 2008-11-21
- Moeller, Gary SIAgranted 2017-04-21
- Moeller, Gary SIAgranted 2004-09-08cancelled 2007-04-24
- Woody, Cloyd ANVgranted 2016-05-21
- Woody, Cloyd ANVgranted 2016-03-16cancelled 2016-05-21
Successor callsigns
Callsigns held now by people who previously held K0BT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0BT, oldest first.
- HENDRICKSON, NORMAN E CA1997-01-31 → cancelled 2006-10-31
- ARMSTRONG, ROBERT W AZ2018-08-28 active