Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9SZ callsign genealogy
Currently held by Cromis, Marc 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 AC9SZ's current licensee, walking backwards.
- Cromis, Marc JINgranted 2014-06-24cancelled 2018-05-18
Successor callsigns
Callsigns held now by people who previously held AC9SZ.
No current licensee on record previously held this callsign.