Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9MRH callsign genealogy
Currently held by Herr, Michael 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 KD9MRH's current licensee, walking backwards.
- Herr, Michael RILgranted 2016-11-07cancelled 2016-12-10
Successor callsigns
Callsigns held now by people who previously held KD9MRH.
No current licensee on record previously held this callsign.