Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NO9L callsign genealogy
Currently held by DERKACH, WILLIAM 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 NO9L's current licensee, walking backwards.
- Rodriguez, AlexTXgranted 2013-12-05cancelled 2023-09-09
Successor callsigns
Callsigns held now by people who previously held NO9L.
- Rodriguez, AlexTXgranted 2024-06-11
All historical holders
Every license row we've seen with the callsign NO9L, oldest first.
- DERKACH, WILLIAM J IL2011-02-22 → cancelled 2023-05-23
- Rodriguez, Alex TX2023-09-09 → cancelled 2024-06-11