Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NM9U callsign genealogy
Currently held by Martin, Mark E
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 NM9U's current licensee, walking backwards.
- Martin, Mark EILgranted 2021-08-09cancelled 2023-08-11
Successor callsigns
Callsigns held now by people who previously held NM9U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NM9U, oldest first.
- Frank, Jerry D TN2011-07-09 → cancelled 2023-07-12
- Martin, Mark E IL2023-08-11 active