Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA0SON callsign genealogy
Currently held by KLEIN, JANICE M
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 KA0SON's current licensee, walking backwards.
- KLEIN, MARTYCAgranted 2023-10-17cancelled 2023-11-25
Successor callsigns
Callsigns held now by people who previously held KA0SON.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA0SON, oldest first.
- KLEIN, JANICE M ND2015-03-12 → cancelled 2021-12-08
- KLEIN, MARTY CA2023-11-25 active