Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4OIS callsign genealogy
Currently held by RULE, KEVIN W
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 WB4OIS's current licensee, walking backwards.
- RULE, KEVIN WKYgranted 2019-09-20cancelled 2019-10-11
Successor callsigns
Callsigns held now by people who previously held WB4OIS.
- RULE JR, WILBUR WTNgranted 1996-08-22cancelled 1999-12-12