Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4MRB callsign genealogy
Currently held by BYRD, MICHAEL 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 KD4MRB's current licensee, walking backwards.
- BYRD, MICHAEL RNCgranted 2015-04-14cancelled 2015-05-05
Successor callsigns
Callsigns held now by people who previously held KD4MRB.
- TARPLEY, MARVIN WSCgranted 2012-03-09cancelled 2024-04-09
All historical holders
Every license row we've seen with the callsign KD4MRB, oldest first.
- BYRD, MICHAEL R NC2025-09-04 active
- TARPLEY, MARVIN W— → cancelled 1998-12-09