Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9TDO callsign genealogy
Currently held by Ridgway, Tim J
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 K9TDO's current licensee, walking backwards.
- Ridgway, Tim JINgranted 2010-10-04cancelled 2011-05-03
Successor callsigns
Callsigns held now by people who previously held K9TDO.
No current licensee on record previously held this callsign.