Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT4F callsign genealogy
Currently held by TODD JR, LINWOOD B
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 NT4F's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NT4F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NT4F, oldest first.
- GROOMS, CHARLES E SC1997-07-22 → cancelled 2002-05-17
- TODD JR, LINWOOD B NC2017-04-24 active