Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0CKU callsign genealogy
Currently held by WARNEST, TIMOTHY E
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 K0CKU's current licensee, walking backwards.
- WARNEST, TIMOTHY EMNgranted 2016-11-18cancelled 2025-08-15
Successor callsigns
Callsigns held now by people who previously held K0CKU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0CKU, oldest first.
- RICHARDS, DARREL E SD2018-02-07 → cancelled 2025-06-02
- WARNEST, TIMOTHY E MN2025-08-15 active