Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ADI callsign genealogy
Currently held by MACKEY JR, ROYAL V
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 N4ADI's current licensee, walking backwards.
- Giardina, Joseph JFLgranted 2017-02-09cancelled 2019-06-01
Successor callsigns
Callsigns held now by people who previously held N4ADI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ADI, oldest first.
- MACKEY JR, ROYAL V FL2004-10-14 → cancelled 2017-01-13
- Giardina Sr, Joseph J SC2019-06-01 active