Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6OSO callsign genealogy
Currently held by PARKINSON, WILLIAM H B
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 K6OSO's current licensee, walking backwards.
- EMETT, JAMES SCAgranted 2003-03-14cancelled 2005-08-13
Successor callsigns
Callsigns held now by people who previously held K6OSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6OSO, oldest first.
- PARKINSON, WILLIAM H B CA1987-11-24 → cancelled 1999-11-25
- EMETT, JAMES S WA2025-07-15 active