Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N2WZO callsign genealogy
Currently held by THELEN, WILLIAM D
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 N2WZO's current licensee, walking backwards.
- Thelen, William DOHgranted 2024-01-25cancelled 2024-02-13
Successor callsigns
Callsigns held now by people who previously held N2WZO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N2WZO, oldest first.
- THELEN, WILLIAM D NY1993-10-26 → cancelled 2005-10-27
- Thelen, William D OH2024-02-13 active