Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9THC callsign genealogy
Currently held by Sparks, Jason
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 W9THC's current licensee, walking backwards.
- SPARKS, JASONCAgranted 2021-02-23cancelled 2023-12-16
Successor callsigns
Callsigns held now by people who previously held W9THC.
- SPARKS, JASONCAgranted 2021-02-23cancelled 2023-12-16
All historical holders
Every license row we've seen with the callsign W9THC, oldest first.
- Sparks Sr., Jason C CA2019-12-13 → cancelled 2021-02-23
- Sparks, Jason CA2023-12-16 active