Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6TSO callsign genealogy
Currently held by LUDWIGSEN, JEAN E
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 K6TSO's current licensee, walking backwards.
- LUDWIGSEN, JEAN ECAgranted 2017-03-21cancelled 2017-04-29
Successor callsigns
Callsigns held now by people who previously held K6TSO.
No current licensee on record previously held this callsign.