Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5TXX callsign genealogy
Currently held by SPEER, CARL D
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 K5TXX's current licensee, walking backwards.
- SPEER, CARL DTXgranted 1996-02-27cancelled 2003-03-04
Successor callsigns
Callsigns held now by people who previously held K5TXX.
- KIRK, STEPHEN JTXgranted 2020-11-06
All historical holders
Every license row we've seen with the callsign K5TXX, oldest first.
- KIRK, STEPHEN J TX2000-06-09 → cancelled 2000-07-07
- SPEER, CARL D TX2022-12-09 active