Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5MKS callsign genealogy
Currently held by SIDDENS SR, ROBERT W
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 W5MKS's current licensee, walking backwards.
- STINNETT, MICHAEL KTXgranted 2022-06-03cancelled 2022-06-22
Successor callsigns
Callsigns held now by people who previously held W5MKS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5MKS, oldest first.
- SIDDENS SR, ROBERT W TX1988-07-05 → cancelled 2000-07-06
- Butler, Joseph E OK2006-06-20 → cancelled 2018-06-21
- STINNETT, MICHAEL K TX2022-06-22 active