Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6RIO callsign genealogy
Currently held by PORT, DAN N
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 N6RIO's current licensee, walking backwards.
- Rio, John MCAgranted 2024-01-27cancelled 2024-02-16
Successor callsigns
Callsigns held now by people who previously held N6RIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6RIO, oldest first.
- PORT, DAN N CA1998-04-22 → cancelled 2010-04-23
- Rio, John M CA2024-02-16 active