Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR0CKT callsign genealogy
Currently held by Calderwood, Thomas C
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 KR0CKT's current licensee, walking backwards.
- Chanes, Bryce ACAgranted 2011-12-16cancelled 2014-08-26
Successor callsigns
Callsigns held now by people who previously held KR0CKT.
- Calderwood, Thomas CCAgranted 2011-09-16cancelled 2016-09-24
All historical holders
Every license row we've seen with the callsign KR0CKT, oldest first.
- Calderwood, Thomas C CA2011-07-23 → cancelled 2011-09-16
- Chanes, Bryce A WA2025-03-05 active