Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5TXU callsign genealogy
Currently held by TXU Amateur Radio Club
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 K5TXU's current licensee, walking backwards.
- COTHERN, DONALD WTXgranted 2006-09-13cancelled 2008-07-18
Successor callsigns
Callsigns held now by people who previously held K5TXU.
- KB5LSexpiredLone Star Amateur Radio ClubTXgranted 2003-08-15cancelled 2015-08-18
All historical holders
Every license row we've seen with the callsign K5TXU, oldest first.
- TXU Amateur Radio Club TX2000-04-21 → cancelled 2003-08-15
- COTHERN, DONALD W TX2008-07-18 → cancelled 2020-07-21