Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4YBR callsign genealogy
Currently held by WILLIAMSON, MARK G
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 W4YBR's current licensee, walking backwards.
- WILLIAMSON, MARK GSCgranted 2014-02-10cancelled 2016-05-10
Successor callsigns
Callsigns held now by people who previously held W4YBR.
No current licensee on record previously held this callsign.