Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9MKM callsign genealogy
Currently held by Graunke, Jeffrey 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 N9MKM's current licensee, walking backwards.
- Graunke, Jeffrey AILgranted 2025-04-30cancelled 2025-05-20
Successor callsigns
Callsigns held now by people who previously held N9MKM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9MKM, oldest first.
- GRAUNKE Mr., JEFFREY A IL2002-05-09 → cancelled 2014-05-10
- Graunke, Jeffrey A IL2025-05-20 active