Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD5YYZ callsign genealogy
Currently held by Guzman, Jose A
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 KD5YYZ's current licensee, walking backwards.
- Tokunaga, Glenn HNVgranted 2021-02-08cancelled 2021-03-02
Successor callsigns
Callsigns held now by people who previously held KD5YYZ.
- Guzman, Jose ATXgranted 2025-02-08
All historical holders
Every license row we've seen with the callsign KD5YYZ, oldest first.
- Guzman, Jose A TX2003-08-26 → cancelled 2003-10-07
- Tokunaga, Glenn H NV2021-03-02 active