Confidence: Medium · Source: FCC ULS · As of 2026-11-04
K6TRX callsign genealogy
Currently held by SPARLIN, DOUGLAS G
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 K6TRX's current licensee, walking backwards.
- Mohiuddin, MerajCAgranted 2026-09-29cancelled 2026-10-20
Successor callsigns
Callsigns held now by people who previously held K6TRX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6TRX, oldest first.
- SPARLIN, DOUGLAS G CA2001-01-03 → cancelled 2013-01-04
- FISHER, ROBERT G CA2014-08-05 → cancelled 2026-08-08
- Mohiuddin, Meraj CA2026-10-20 active