Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9RKA callsign genealogy
Currently held by TRULOCK, BILLY 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 K9RKA's current licensee, walking backwards.
- Crispin, Adam RTXgranted 2015-05-08cancelled 2018-09-28
Successor callsigns
Callsigns held now by people who previously held K9RKA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9RKA, oldest first.
- TRULOCK, BILLY A IN2005-03-01 → cancelled 2005-07-03
- Crispin, Adam R TX2018-09-28 active