Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9TNT callsign genealogy
Currently held by Byer, James M
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 K9TNT's current licensee, walking backwards.
- Byer, James MILgranted 2010-02-25cancelled 2010-03-16
Successor callsigns
Callsigns held now by people who previously held K9TNT.
- DUFF, JAMES LMIgranted 2007-11-27cancelled 2009-02-23
All historical holders
Every license row we've seen with the callsign K9TNT, oldest first.
- DUFF, JAMES L MI1999-06-17 → cancelled 2007-11-27
- Byer, James M IL2020-02-21 active