Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5DIX callsign genealogy
Currently held by Williams, Mark R
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 W5DIX's current licensee, walking backwards.
- Williams, Mark RMSgranted 2012-07-19cancelled 2016-02-26
Successor callsigns
Callsigns held now by people who previously held W5DIX.
- Calhoun, Thomas RTXgranted 2007-04-17cancelled 2011-11-29
All historical holders
Every license row we've seen with the callsign W5DIX, oldest first.
- Calhoun, Thomas R TX2006-08-15 → cancelled 2007-04-17
- Williams, Mark R MS2026-01-14 active