Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK6PHD callsign genealogy
Currently held by HSU, ALLEN J
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 KK6PHD's current licensee, walking backwards.
- HSU, ALLEN JCAgranted 2021-12-09cancelled 2022-01-28
Successor callsigns
Callsigns held now by people who previously held KK6PHD.
All historical holders
Every license row we've seen with the callsign KK6PHD, oldest first.
- Cordova, James CA2014-10-07 → cancelled 2014-11-08
- HSU, ALLEN J CA2022-01-28 → cancelled 2023-01-21