Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9ADT callsign genealogy
Currently held by Thompson, Mark 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 K9ADT's current licensee, walking backwards.
- Thompson, Mark ENCgranted 2012-11-15cancelled 2018-03-13
Successor callsigns
Callsigns held now by people who previously held K9ADT.
No current licensee on record previously held this callsign.