Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA1ZSX callsign genealogy
Currently held by FRASE, JASON
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 KA1ZSX's current licensee, walking backwards.
- FRASE, JASONCTgranted 2023-03-07cancelled 2023-03-28
Successor callsigns
Callsigns held now by people who previously held KA1ZSX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1ZSX, oldest first.
- FRASE, JASON J CT1992-02-25 → cancelled 2004-02-26
- FRASE, JASON CT2023-03-28 active