Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ6PT callsign genealogy
Currently held by Knizeski, Mary Beth
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 AJ6PT's current licensee, walking backwards.
- Knizeski, Mary BethAZgranted 2017-12-18cancelled 2024-04-23
Successor callsigns
Callsigns held now by people who previously held AJ6PT.
- Schellhorn, NikolausCAgranted 2020-09-09
All historical holders
Every license row we've seen with the callsign AJ6PT, oldest first.
- Schellhorn, Nikolaus CA2020-08-18 → cancelled 2020-09-09
- Knizeski, Mary Beth AZ2024-04-23 active