Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9CRL callsign genealogy
Currently held by CASTLE, JAMES J
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 K9CRL's current licensee, walking backwards.
- CASTLE, JAMES JTXgranted 2019-06-20cancelled 2019-08-20
Successor callsigns
Callsigns held now by people who previously held K9CRL.
No current licensee on record previously held this callsign.