Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ4CZ callsign genealogy
Currently held by Diez, Carlos W
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 AJ4CZ's current licensee, walking backwards.
- Diez, Carlos WFLgranted 2003-02-18cancelled 2007-11-05
Successor callsigns
Callsigns held now by people who previously held AJ4CZ.
- Diez, Carlos WCOgranted 2018-10-09