Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WO6F callsign genealogy
Currently held by Ridley, Robert S
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 WO6F's current licensee, walking backwards.
- Ridley, Robert SCAgranted 2016-06-07cancelled 2017-11-21
Successor callsigns
Callsigns held now by people who previously held WO6F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WO6F, oldest first.
- SULLIVAN, ROBERT L CA2005-08-17 → cancelled 2017-11-02
- Ridley, Robert S CA2017-11-21 active