Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4AMJ callsign genealogy
Currently held by Robuck, John L
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 N4AMJ's current licensee, walking backwards.
- ROBUCK, JOHN LVAgranted 1996-08-21cancelled 2004-02-03
Successor callsigns
Callsigns held now by people who previously held N4AMJ.
No current licensee on record previously held this callsign.