Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1YUU callsign genealogy
Currently held by Sowden, Matthew 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 K1YUU's current licensee, walking backwards.
- Sowden, Matthew CPAgranted 2015-06-17cancelled 2017-04-04
Successor callsigns
Callsigns held now by people who previously held K1YUU.
- BARRETT, ROBERT EFLgranted 2011-11-15cancelled 2023-10-06
All historical holders
Every license row we've seen with the callsign K1YUU, oldest first.
- BARRETT, ROBERT E VT1994-04-05 → cancelled 2001-10-05
- Sowden, Matthew C MD2017-04-04 active