Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5JRT callsign genealogy
Currently held by FROST, JOHN 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 KC5JRT's current licensee, walking backwards.
- FROST JR, JOHN LTXgranted 2010-11-02cancelled 2012-09-22
Successor callsigns
Callsigns held now by people who previously held KC5JRT.
- FROST JR, JOHN LTXgranted 2010-11-02cancelled 2012-09-22
All historical holders
Every license row we've seen with the callsign KC5JRT, oldest first.
- FROST, JOHN L TX2004-06-29 → cancelled 2010-11-02
- FROST JR, JOHN L TX2023-02-14 active