Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA4ZN callsign genealogy
Currently held by CANTU, JAMES 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 AA4ZN's current licensee, walking backwards.
- Cantu, James MTNgranted 2014-08-29cancelled 2015-12-11
Successor callsigns
Callsigns held now by people who previously held AA4ZN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA4ZN, oldest first.
- SISSON, FRED C FL1996-12-18 → cancelled 2008-12-19
- CANTU, JAMES M TN2025-12-30 active