Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NX6DX callsign genealogy
Currently held by PORTLOCK, 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 NX6DX's current licensee, walking backwards.
- PORTLOCK, JOHN CCAgranted 2005-05-04cancelled 2011-06-03
Successor callsigns
Callsigns held now by people who previously held NX6DX.
No current licensee on record previously held this callsign.