Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4NYC callsign genealogy
Currently held by NICHOLSON, DAVID A
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 KD4NYC's current licensee, walking backwards.
- PROENZA, ROBERTOFLgranted 2007-01-23cancelled 2007-02-13
- KB2TJHno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KD4NYC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4NYC, oldest first.
- NICHOLSON, DAVID A KY1992-06-30 → cancelled 2004-07-01
- Proenza, Roberto FL2016-12-28 active