Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4OU callsign genealogy
Currently held by GREEN, BERTRAM P
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 KN4OU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KN4OU.
No current licensee on record previously held this callsign.