Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4OII callsign genealogy
Currently held by MC NEILL III, CHARLES S
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 N4OII's current licensee, walking backwards.
- Robertson, ChristopherNCgranted 2021-03-17cancelled 2021-08-17
Successor callsigns
Callsigns held now by people who previously held N4OII.
- Robertson, Christopher DALgranted 2021-10-16
All historical holders
Every license row we've seen with the callsign N4OII, oldest first.
- MC NEILL III, CHARLES S VA1996-03-21 → cancelled 2008-03-22
- Robertson, Christopher NC2021-08-17 → cancelled 2021-10-16