Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7BTB callsign genealogy
Currently held by LEATHEM, JAMES E
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 K7BTB's current licensee, walking backwards.
- Buckle, Blaine TORgranted 2016-03-10cancelled 2020-04-25
Successor callsigns
Callsigns held now by people who previously held K7BTB.
- LEATHEM, JAMES EAZgranted 2013-10-17cancelled 2026-03-06
All historical holders
Every license row we've seen with the callsign K7BTB, oldest first.
- LEATHEM, JAMES E AZ2005-02-18 → cancelled 2013-10-17
- Buckle, Blaine T OR2020-04-25 active