Confidence: Medium · Source: FCC ULS · As of 2026-09-10
KB4SP callsign genealogy
Currently held by Williams, Brent 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 KB4SP's current licensee, walking backwards.
- WILLIAMS, BRENT EGAgranted 2006-10-17cancelled 2012-03-06
Successor callsigns
Callsigns held now by people who previously held KB4SP.
- Williams 667, Brent EALgranted 2023-04-25