Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9TD callsign genealogy
Currently held by KRATZ, ARTHUR 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 N9TD's current licensee, walking backwards.
- FRONEK, DEREK MINgranted 2018-12-19cancelled 2023-12-08
Successor callsigns
Callsigns held now by people who previously held N9TD.
- Mills, Phil DAKgranted 2021-11-19cancelled 2026-01-16
All historical holders
Every license row we've seen with the callsign N9TD, oldest first.
- KRATZ, ARTHUR J AZ2003-12-30 → cancelled 2010-06-10
- Mills, Phil D MO2012-06-29 → cancelled 2021-11-19
- FRONEK, DEREK M IN2023-12-08 active