Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4WMB callsign genealogy
Currently held by BREVILLE, WALTER L
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 W4WMB's current licensee, walking backwards.
- Bosworth, Michael LVAgranted 2018-05-04cancelled 2018-05-25
Successor callsigns
Callsigns held now by people who previously held W4WMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4WMB, oldest first.
- BREVILLE, WALTER L MO2003-03-08 → cancelled 2015-03-10
- Bosworth, Michael L VA2018-05-25 active