Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA6SLO callsign genealogy
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 WA6SLO's current licensee, walking backwards.
- Frank, Matthew SCAgranted 2010-04-16cancelled 2016-02-17
Successor callsigns
Callsigns held now by people who previously held WA6SLO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA6SLO, oldest first.
- Frank, Matthew S CA2016-02-17 active
- —— → cancelled 1997-09-17