Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4BU callsign genealogy
Currently held by BALDWIN, ROGER 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 W4BU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4BU.
No current licensee on record previously held this callsign.