Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NI4M callsign genealogy
Currently held by FLETCHER, GLENN M
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 NI4M's current licensee, walking backwards.
- FLETCHER, GLENN MFLgranted 1998-10-23cancelled 2002-09-21
Successor callsigns
Callsigns held now by people who previously held NI4M.
- GWIN, JOHN TTNgranted 2020-06-04
All historical holders
Every license row we've seen with the callsign NI4M, oldest first.
- GWIN, JOHN T TN1993-10-26 → cancelled 2000-09-01
- FLETCHER, GLENN M FL2022-06-25 active