Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4ZM callsign genealogy
Currently held by CROSBY, DUSTIN J
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 AJ4ZM's current licensee, walking backwards.
- CROSBY, DUSTIN JNCgranted 2009-12-01cancelled 2010-05-24
Successor callsigns
Callsigns held now by people who previously held AJ4ZM.
- CROSBY, DUSTIN JPAgranted 2020-08-25