Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4OSU callsign genealogy
Currently held by Rapp, Sherri
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 WB4OSU's current licensee, walking backwards.
- Rapp, SherriNCgranted 2015-09-25cancelled 2015-10-16
Successor callsigns
Callsigns held now by people who previously held WB4OSU.
No current licensee on record previously held this callsign.