Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0TZW callsign genealogy
Currently held by MILLER, WARREN E
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 N0TZW's current licensee, walking backwards.
- ZWOLAK, TIMOTHYCOgranted 2020-08-03cancelled 2020-08-21
Successor callsigns
Callsigns held now by people who previously held N0TZW.
- ZWOLAK, TIMOTHYCOgranted 2022-03-18
All historical holders
Every license row we've seen with the callsign N0TZW, oldest first.
- MILLER, WARREN E MN1992-08-18 → cancelled 2004-08-19
- ZWOLAK, TIMOTHY CO2020-08-21 → cancelled 2022-03-18