Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA1YZA callsign genealogy
Currently held by SOUZA, THOMAS 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 KA1YZA's current licensee, walking backwards.
- Souza, Thomas AMAgranted 2026-05-28cancelled 2026-06-16
Successor callsigns
Callsigns held now by people who previously held KA1YZA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1YZA, oldest first.
- SOUZA, THOMAS A MA2013-01-07 → cancelled 2024-08-07
- Souza, Thomas A MA2026-06-16 active