Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7TRF callsign genealogy
Currently held by RYAN, DAVID 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 K7TRF's current licensee, walking backwards.
- RYAN, DAVID JWYgranted 2006-06-16cancelled 2016-01-01
Successor callsigns
Callsigns held now by people who previously held K7TRF.
No current licensee on record previously held this callsign.