Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4OII callsign genealogy
Currently held by Robertson, Christopher
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 KO4OII'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 KO4OII.
- Robertson, ChristopherNCgranted 2021-08-17cancelled 2021-10-16