Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CIO callsign genealogy
Currently held by Womack, Shelby A
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 K5CIO's current licensee, walking backwards.
- Womack, Shelby ATXgranted 2014-06-17cancelled 2016-04-01
Successor callsigns
Callsigns held now by people who previously held K5CIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CIO, oldest first.
- WITTMAN, WILLIAM L TX1999-10-28 → cancelled 2011-10-29
- Womack, Shelby A TX2016-04-01 active