Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3ISB callsign genealogy
Currently held by SCHNABL, FRANK 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 W3ISB's current licensee, walking backwards.
- Weisberger, TravisCAgranted 2020-06-22cancelled 2020-09-01
Successor callsigns
Callsigns held now by people who previously held W3ISB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3ISB, oldest first.
- SCHNABL, FRANK J PA2007-07-27 → cancelled 2019-10-22
- Weisberger, Travis CA2020-09-01 active