Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6GAS callsign genealogy
Currently held by Sprehn, Gregory
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 W6GAS's current licensee, walking backwards.
- Sprehn, GregoryCAgranted 2016-02-24cancelled 2016-04-12
Successor callsigns
Callsigns held now by people who previously held W6GAS.
- JOHNSTON III, WILLIAM DCAgranted 2017-10-23cancelled 2020-02-11
All historical holders
Every license row we've seen with the callsign W6GAS, oldest first.
- JOHNSTON III, WILLIAM D CA2007-01-18 → cancelled 2008-01-15
- Sprehn, Gregory CA2016-04-12 active