Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1BTC callsign genealogy
Currently held by COOK, JAMES 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 W1BTC's current licensee, walking backwards.
- BERGSTRESSER IV, JOHN WTXgranted 2025-04-22cancelled 2025-08-08
Successor callsigns
Callsigns held now by people who previously held W1BTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1BTC, oldest first.
- LA GASSE, DORA M MA1987-10-13 → cancelled 1999-10-14
- COOK, JAMES W MA2011-07-19 → cancelled 2023-07-20
- BERGSTRESSER IV, JOHN W TX2025-08-08 active