Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4OSX callsign genealogy
Currently held by Callahan, Scott
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 N4OSX's current licensee, walking backwards.
- FERGUSON, SCOTT WALgranted 2002-09-24cancelled 2005-03-18
Successor callsigns
Callsigns held now by people who previously held N4OSX.
No current licensee on record previously held this callsign.