Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6KAO callsign genealogy
Currently held by GRENFELL, EUGENE S
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 N6KAO's current licensee, walking backwards.
- KAO, JOECAgranted 2004-07-20cancelled 2007-07-31
Successor callsigns
Callsigns held now by people who previously held N6KAO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6KAO, oldest first.
- GRENFELL, EUGENE S CA2003-12-16 → cancelled 2004-11-18
- KAO, JOE CA2017-05-18 active