Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4RHJ callsign genealogy
Currently held by Sandler, Aaron 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 N4RHJ's current licensee, walking backwards.
- MERTENS, ROBERT ENCgranted 2016-12-09cancelled 2024-02-06
Successor callsigns
Callsigns held now by people who previously held N4RHJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4RHJ, oldest first.
- Sandler, Aaron A FL2010-11-18 → cancelled 2023-02-07
- MERTENS, ROBERT E NC2024-02-06 active