Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6TDC callsign genealogy
Currently held by ROBERTS, JOHN 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 K6TDC's current licensee, walking backwards.
- Coble, Tommy DCAgranted 2007-11-27cancelled 2009-02-10
Successor callsigns
Callsigns held now by people who previously held K6TDC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6TDC, oldest first.
- ROBERTS, JOHN M CA1996-12-04 → cancelled 2008-12-05
- Coble, Tommy D CA2018-11-28 active