Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4GRF callsign genealogy
Currently held by GALLAGHER, THOMAS 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 N4GRF's current licensee, walking backwards.
- Griffey, Timothy DKYgranted 2015-06-16cancelled 2015-07-07
Successor callsigns
Callsigns held now by people who previously held N4GRF.
- GALLAGHER, THOMAS JFLgranted 2023-02-23
All historical holders
Every license row we've seen with the callsign N4GRF, oldest first.
- GALLAGHER, THOMAS J FL2011-05-19 → cancelled 2013-03-15
- Griffey, Timothy D KY2025-06-21 active