Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5TKO callsign genealogy
Currently held by Massey, Richard L
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 K5TKO's current licensee, walking backwards.
- Massey, Richard LTXgranted 2016-05-16cancelled 2016-09-27
Successor callsigns
Callsigns held now by people who previously held K5TKO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5TKO, oldest first.
- CRITES, ROBERT M TX1999-02-24 → cancelled 2011-02-25
- Massey, Richard L TX2016-09-27 active