Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9HT callsign genealogy
Currently held by Plonka, Jason R
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 AD9HT's current licensee, walking backwards.
- Plonka, Jason RINgranted 2025-05-09cancelled 2025-11-21
Successor callsigns
Callsigns held now by people who previously held AD9HT.
- Plonka, Jason RINgranted 2026-06-09