Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3TRF callsign genealogy
Currently held by Francis, Thomas R
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 K3TRF's current licensee, walking backwards.
- Finnegan, Thomas RPAgranted 2018-11-28cancelled 2018-12-18
Successor callsigns
Callsigns held now by people who previously held K3TRF.
- Francis, Thomas RPAgranted 2019-03-05
All historical holders
Every license row we've seen with the callsign K3TRF, oldest first.
- Francis, Thomas R PA2008-05-24 → cancelled 2009-05-27
- Finnegan, Thomas R PA2018-12-18 active