Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK7RZ callsign genealogy
Currently held by DUFFIN, JON E
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 KK7RZ's current licensee, walking backwards.
- DUFFIN, JON Ecancelled 1999-02-17
Successor callsigns
Callsigns held now by people who previously held KK7RZ.
No current licensee on record previously held this callsign.