Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MKO callsign genealogy
Currently held by Oldham, Maurice K
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 K9MKO's current licensee, walking backwards.
- Oldham, Maurice KARgranted 2013-04-22cancelled 2017-10-03
Successor callsigns
Callsigns held now by people who previously held K9MKO.
No current licensee on record previously held this callsign.