Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4BIO callsign genealogy
Currently held by Von Baumgarten, Barbara J
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 W4BIO's current licensee, walking backwards.
- Von Baumgarten, Barbara JVAgranted 2007-02-05cancelled 2007-03-02
Successor callsigns
Callsigns held now by people who previously held W4BIO.
No current licensee on record previously held this callsign.