Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1MRB callsign genealogy
Currently held by Breyer, Marian R
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 K1MRB's current licensee, walking backwards.
- BRADSHAW, MATTHEWVAgranted 2022-12-28cancelled 2023-05-12
Successor callsigns
Callsigns held now by people who previously held K1MRB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1MRB, oldest first.
- Breyer, Marian R IN2010-08-28 → cancelled 2022-11-01
- BRADSHAW, MATTHEW VA2023-05-12 active