Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB0ZAP callsign genealogy
Currently held by Zapotocny, Catherine M
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 WB0ZAP's current licensee, walking backwards.
- Zapotocny, Catherine MNEgranted 2006-05-02cancelled 2007-03-20
Successor callsigns
Callsigns held now by people who previously held WB0ZAP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB0ZAP, oldest first.
- SCHUSTER, ROBERT L KS1988-05-31 → cancelled 2000-06-01
- Zapotocny, Catherine M NE2017-01-18 active