Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK7YZ callsign genealogy
Currently held by BUTTERFIELD, 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 KK7YZ's current licensee, walking backwards.
- BUTTERFIELD, JOHN Ccancelled 1999-03-17
Successor callsigns
Callsigns held now by people who previously held KK7YZ.
No current licensee on record previously held this callsign.