Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD7JTT callsign genealogy
Currently held by TOPACIO JR, TIRSO T
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 KD7JTT's current licensee, walking backwards.
- TOPACIO JR, TIRSO TILgranted 2003-02-18cancelled 2008-11-22
Successor callsigns
Callsigns held now by people who previously held KD7JTT.
- Winters, Phillip TORgranted 2020-06-23
All historical holders
Every license row we've seen with the callsign KD7JTT, oldest first.
- Winters, Phillip T OR2000-07-11 → cancelled 2000-08-15
- TOPACIO JR, TIRSO T CA2008-11-22 → cancelled 2020-11-24