Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5CRJ callsign genealogy
Currently held by Warburton, Alan W
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 K5CRJ's current licensee, walking backwards.
- Johnson, Colby RTXgranted 2024-03-05cancelled 2025-08-15
Successor callsigns
Callsigns held now by people who previously held K5CRJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CRJ, oldest first.
- Warburton, Alan W MS2012-12-28 → cancelled 2024-12-31
- Johnson, Colby TX2025-08-15 active