Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ADQ callsign genealogy
Currently held by ERDIN JR, ROBERT 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 N4ADQ's current licensee, walking backwards.
- ERDIN JR, ROBERT ANCgranted 2011-10-12cancelled 2011-11-04
Successor callsigns
Callsigns held now by people who previously held N4ADQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ADQ, oldest first.
- ERDIN JR, ROBERT A NC1998-06-16 → cancelled 2010-06-17
- ERDIN JR, ROBERT A NC2021-08-11 active