Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4ZM callsign genealogy
Currently held by RING, LOUIS 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 KK4ZM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KK4ZM.
No current licensee on record previously held this callsign.