Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9IV callsign genealogy
Currently held by Crozier, Craig R
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 AB9IV's current licensee, walking backwards.
- Crozier, Craig RILgranted 1997-10-24cancelled 2004-04-13
Successor callsigns
Callsigns held now by people who previously held AB9IV.
No current licensee on record previously held this callsign.