Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NJ4D callsign genealogy
Currently held by SARVER, FRED K
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 NJ4D's current licensee, walking backwards.
- Hanneman, Steven PFLgranted 2025-03-11
Successor callsigns
Callsigns held now by people who previously held NJ4D.
All historical holders
Every license row we've seen with the callsign NJ4D, oldest first.
- JOURDAN, JONATHAN P SC2007-03-01 → cancelled 2010-11-26
- SARVER, FRED K NC2012-12-15 → cancelled 2022-09-26
- Hanneman, Steven P FL2024-10-16 → cancelled 2025-03-11