Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4OPH callsign genealogy
Currently held by COWAN JR, DAVID D
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 N4OPH's current licensee, walking backwards.
- ROBERTS, JOHN DGAgranted 2014-02-26cancelled 2014-05-17
Successor callsigns
Callsigns held now by people who previously held N4OPH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4OPH, oldest first.
- COWAN JR, DAVID D KY1996-05-07 → cancelled 2008-05-08
- Roberts, John D GA2024-05-08 active