Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MOO callsign genealogy
Currently held by MASON JR, HARRY 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 K6MOO's current licensee, walking backwards.
- HO, JEAN CCAgranted 2009-03-06cancelled 2009-03-28
Successor callsigns
Callsigns held now by people who previously held K6MOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6MOO, oldest first.
- MASON JR, HARRY S CA1995-02-16 → cancelled 2007-02-17
- HO, JEAN C CA2019-02-13 active