Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM1O callsign genealogy
Currently held by NAMNOUM, THOMAS M
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 KM1O's current licensee, walking backwards.
- Clark, Michael JMEgranted 2009-05-11cancelled 2009-07-25
Successor callsigns
Callsigns held now by people who previously held KM1O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM1O, oldest first.
- NAMNOUM, THOMAS M CT1997-04-02 → cancelled 2009-04-03
- CLARK, MICHAEL J FL2019-05-01 active