Confidence: Medium · Source: FCC ULS · As of 2026-09-10
AC4KB callsign genealogy
Currently held by SUMNER, DAVID P
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 AC4KB's current licensee, walking backwards.
- BROWN, KENNETH JFLgranted 2009-09-14cancelled 2011-03-15
- KC4MXBno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AC4KB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4KB, oldest first.
- SUMNER, DAVID P SC1991-10-08 → cancelled 2003-10-09
- BROWN, KENNETH J FL2021-01-07 active