Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WO1Z callsign genealogy
Currently held by TOOLEY JR, ROBERT
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 WO1Z's current licensee, walking backwards.
- TOOLEY JR, ROBERTWAgranted 2020-11-05cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held WO1Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WO1Z, oldest first.
- Guptill, Frank E CT2010-11-23 → cancelled 2019-02-12
- TOOLEY JR, ROBERT MT2021-03-09 active