Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4ZGY callsign genealogy
Currently held by Rock, Gregory J
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 KM4ZGY's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KM4ZGY.
- ROCK, GREGORY JPAgranted 2016-12-17cancelled 2021-06-11