Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1ONO callsign genealogy
Currently held by Thompson, Matthew 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 KA1ONO's current licensee, walking backwards.
- Thompson, Matthew JFLgranted 2011-09-20cancelled 2018-12-14
Successor callsigns
Callsigns held now by people who previously held KA1ONO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1ONO, oldest first.
- KRZYZEWSKI, MITCHELL CT1996-08-12 → cancelled 2008-08-13
- Thompson, Matthew J VA2018-12-14 active