Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4BT callsign genealogy
Currently held by KNEDLER, CRAIG 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 W4BT's current licensee, walking backwards.
- Jacobs, Bruce HTNgranted 2021-08-09cancelled 2023-12-02
Successor callsigns
Callsigns held now by people who previously held W4BT.
- KNEDLER, CRAIG RSDgranted 2021-11-13cancelled 2022-04-29
All historical holders
Every license row we've seen with the callsign W4BT, oldest first.
- Letson, Andrew B FL2006-12-05 → cancelled 2015-08-24
- KNEDLER, CRAIG R SD2017-09-12 → cancelled 2021-11-13
- Jacobs, Bruce H FL2023-12-02 active