Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4ERD callsign genealogy
Currently held by Heinlein, Jonathan J
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 N4ERD's current licensee, walking backwards.
- Heinlein, Jonathan JVAgranted 2009-10-16cancelled 2009-11-03
Successor callsigns
Callsigns held now by people who previously held N4ERD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ERD, oldest first.
- MEES, GEORGE M FL1996-11-05 → cancelled 2008-11-06
- Heinlein, Jonathan J VA2019-11-16 active