Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9POL callsign genealogy
Currently held by WALTHER, JASON 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 N9POL's current licensee, walking backwards.
- MAZIUK, PETERILgranted 2005-06-07cancelled 2011-03-01
Successor callsigns
Callsigns held now by people who previously held N9POL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9POL, oldest first.
- WALTHER, JASON D IN1992-05-26 → cancelled 2004-05-27
- MAZIUK, PIOTR IL2021-01-05 active