Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1MF callsign genealogy
Currently held by FOSTER, MARK L
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 N1MF's current licensee, walking backwards.
- Duester, Alan RMAgranted 2018-04-11cancelled 2018-12-15
Successor callsigns
Callsigns held now by people who previously held N1MF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1MF, oldest first.
- FOSTER, MARK L IN2006-09-30 → cancelled 2018-11-27
- Duester, Alan R MA2018-12-15 active