Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4OOC callsign genealogy
Currently held by WILLOUGHBY, ROY K
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 WB4OOC's current licensee, walking backwards.
- WILLOUGHBY, ROY KSCgranted 2010-02-22cancelled 2010-06-02
Successor callsigns
Callsigns held now by people who previously held WB4OOC.
- WILLOUGHBY, ROY KSCgranted 2016-06-04