Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4OBY callsign genealogy
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 N4OBY's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held N4OBY.
- ARMSTRONG, THOMAS RNCgranted 1991-12-24cancelled 2003-12-25