Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SOT callsign genealogy
Currently held by Thames, Shea
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 K4SOT's current licensee, walking backwards.
- Thames, Shea ONCgranted 2017-03-08cancelled 2017-03-28
Successor callsigns
Callsigns held now by people who previously held K4SOT.
No current licensee on record previously held this callsign.