Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4SIW callsign genealogy
Currently held by HERRING JR, CHARLES D
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 KB4SIW's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KB4SIW.
- HERRING JR, CHARLES DALgranted 2020-11-21