Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9CZ callsign genealogy
Currently held by Rothblatt, Stephen H
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 AB9CZ's current licensee, walking backwards.
- Rothblatt, Stephen HILgranted 1996-03-28cancelled 2001-08-23
Successor callsigns
Callsigns held now by people who previously held AB9CZ.
No current licensee on record previously held this callsign.