Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7SPX callsign genealogy
Currently held by Robertson, John W
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 KJ7SPX's current licensee, walking backwards.
- Robertson, John WWAgranted 2019-11-26cancelled 2020-01-24
Successor callsigns
Callsigns held now by people who previously held KJ7SPX.
No current licensee on record previously held this callsign.