Confidence: Medium · Source: FCC ULS · As of 2026-09-11
N4JSF callsign genealogy
Currently held by Feltman, James S
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 N4JSF's current licensee, walking backwards.
- Feltman, James STNgranted 2011-03-03cancelled 2012-10-23
Successor callsigns
Callsigns held now by people who previously held N4JSF.
No current licensee on record previously held this callsign.