Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD7CO callsign genealogy
Currently held by Knudtson, Thomas O
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 AD7CO's current licensee, walking backwards.
- Knudtson, Thomas OWAgranted 2002-01-09cancelled 2004-05-03
Successor callsigns
Callsigns held now by people who previously held AD7CO.
No current licensee on record previously held this callsign.