Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3OLN 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 N3OLN'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 N3OLN.
- UNDERWOOD, THOMAS CMDgranted 1998-11-25cancelled 2008-07-11