Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1RDO callsign genealogy
Currently held by BARRETT, JAMES M
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 K1RDO's current licensee, walking backwards.
- Shumbo, Brandon WCTgranted 2024-12-05cancelled 2025-05-23
Successor callsigns
Callsigns held now by people who previously held K1RDO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1RDO, oldest first.
- BARRETT, JAMES M CT2008-10-24 → cancelled 2020-12-23
- Shumbo, Brandon W CT2025-05-23 active