Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MBM callsign genealogy
Currently held by MAYES, EMMETT H
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 K4MBM's current licensee, walking backwards.
- SWEENEY, MICHAELFLgranted 2024-05-01cancelled 2024-07-19
Successor callsigns
Callsigns held now by people who previously held K4MBM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MBM, oldest first.
- MAYES, EMMETT H AL2006-11-08 → cancelled 2019-02-12
- SWEENEY, MICHAEL FL2024-07-19 active