Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4MN callsign genealogy
Currently held by Rosenblum, David 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 AI4MN's current licensee, walking backwards.
- Rosenblum, David AFLgranted 2002-06-10cancelled 2005-10-18
Successor callsigns
Callsigns held now by people who previously held AI4MN.
- Rosenblum, David AFLgranted 2025-12-11