Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4OKX callsign genealogy
Currently held by ROSSMAN, WILLIAM G
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 W4OKX's current licensee, walking backwards.
- Tyndall, Clifton NNCgranted 2015-10-27cancelled 2025-06-28
Successor callsigns
Callsigns held now by people who previously held W4OKX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4OKX, oldest first.
- ROSSMAN, WILLIAM G FL2008-05-20 → cancelled 2020-05-21
- Tyndall, Clifton N NC2025-06-28 active