Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ4MN callsign genealogy
Currently held by Schwarzkopf, Michael 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 AJ4MN's current licensee, walking backwards.
- Schwarzkopf, Michael AGAgranted 2004-08-07cancelled 2008-11-17
Successor callsigns
Callsigns held now by people who previously held AJ4MN.
No current licensee on record previously held this callsign.