Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5TNA callsign genealogy
Currently held by Hemphill, John M
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 K5TNA's current licensee, walking backwards.
- Hemphill, John MTXgranted 2008-12-30cancelled 2011-12-06
Successor callsigns
Callsigns held now by people who previously held K5TNA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5TNA, oldest first.
- HEMPHILL, WILLIAM B TX1998-02-09 → cancelled 2010-02-10
- Hemphill, John M CO2021-09-09 active