Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9CTO callsign genealogy
Currently held by SILES, DAVID D
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 N9CTO's current licensee, walking backwards.
- Siles, David DILgranted 2007-04-04cancelled 2007-05-08
Successor callsigns
Callsigns held now by people who previously held N9CTO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9CTO, oldest first.
- ROSEN, STEPHEN M IL1987-09-29 → cancelled 1999-09-30
- SILES, DAVID D FL2017-03-06 active