Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9SOO callsign genealogy
Currently held by ROUDEBUSH, JOHN C
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 N9SOO's current licensee, walking backwards.
- Martin, Philip AWIgranted 2003-10-07cancelled 2004-07-27
Successor callsigns
Callsigns held now by people who previously held N9SOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9SOO, oldest first.
- Martin, Philip A WI2024-10-29 active
- ROUDEBUSH, JOHN C— → cancelled 1998-11-23