Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7BTF callsign genealogy
Currently held by TWEEDDALE, ALLEN L
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 W7BTF's current licensee, walking backwards.
- SCHAACK, LARRY AUTgranted 2020-01-28cancelled 2020-02-19
Successor callsigns
Callsigns held now by people who previously held W7BTF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7BTF, oldest first.
- TWEEDDALE, ALLEN L OR1992-12-22 → cancelled 2004-12-23
- SCHAACK, LARRY A UT2020-02-19 active