Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA1BTK callsign genealogy
Currently held by Winchester II, Gardner H
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 KA1BTK's current licensee, walking backwards.
- Woodworth, Crystal MMAgranted 2015-04-17cancelled 2021-02-02
Successor callsigns
Callsigns held now by people who previously held KA1BTK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1BTK, oldest first.
- Winchester II, Gardner H MA2013-09-04 → cancelled 2020-11-11
- Woodworth, Crystal M MA2021-02-02 active