Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4MZ callsign genealogy
Currently held by BROWN, RALPH 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 AI4MZ's current licensee, walking backwards.
- BROWN, RALPH MFLgranted 1997-02-04cancelled 2005-12-01
Successor callsigns
Callsigns held now by people who previously held AI4MZ.
No current licensee on record previously held this callsign.