Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NA4HI callsign genealogy
Currently held by SOBEL, MICHAEL 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 NA4HI's current licensee, walking backwards.
- SOBEL, MICHAEL JVAgranted 1998-03-03cancelled 2000-12-19
Successor callsigns
Callsigns held now by people who previously held NA4HI.
No current licensee on record previously held this callsign.