Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4SBI callsign genealogy
Currently held by FIELDS, KEVIN J
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 W4SBI's current licensee, walking backwards.
- FIELDS, KEVIN JVAgranted 2000-05-31cancelled 2001-01-03
Successor callsigns
Callsigns held now by people who previously held W4SBI.
No current licensee on record previously held this callsign.