Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SOX callsign genealogy
Currently held by JASPER, MICHAEL 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 W6SOX's current licensee, walking backwards.
- JASPER, MICHAEL SMAgranted 2017-05-24cancelled 2020-11-20
Successor callsigns
Callsigns held now by people who previously held W6SOX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SOX, oldest first.
- Provenzano, James J CA2006-01-10 → cancelled 2018-01-11
- JASPER, MICHAEL S MA2020-11-20 active