Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4YZ callsign genealogy
Currently held by UPCHURCH, ROBERT 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 WB4YZ's current licensee, walking backwards.
- UPCHURCH, ROBERT DSCgranted 1999-07-18cancelled 2002-05-18
Successor callsigns
Callsigns held now by people who previously held WB4YZ.
No current licensee on record previously held this callsign.