Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4MB callsign genealogy
Currently held by Wallace Jr, Roy V
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 KC4MB's current licensee, walking backwards.
- Bates, Martin RFLgranted 2011-07-01cancelled 2012-06-26
Successor callsigns
Callsigns held now by people who previously held KC4MB.
- Wallace Jr, Roy VMDgranted 2019-05-01
All historical holders
Every license row we've seen with the callsign KC4MB, oldest first.
- Wallace Jr, Roy V MD2007-10-03 → cancelled 2009-07-14
- Bates, Martin R MO2023-03-23 active