Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1MDH callsign genealogy
Currently held by LOIZOS, SOULY A
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 N1MDH's current licensee, walking backwards.
- Hess, Michael DINgranted 2026-01-06cancelled 2026-02-18
Successor callsigns
Callsigns held now by people who previously held N1MDH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1MDH, oldest first.
- LOIZOS, SOULY A NH1992-04-21 → cancelled 2004-04-22
- Hess, Michael D GA2026-02-18 active