Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5THO callsign genealogy
Currently held by Thomson, William L
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 K5THO's current licensee, walking backwards.
- Thomson, William LARgranted 2005-04-19cancelled 2013-09-17
- KA6IMJno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K5THO.
No current licensee on record previously held this callsign.