Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9PX callsign genealogy
Currently held by Klein, William C
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 AB9PX's current licensee, walking backwards.
- Klein, William CWIgranted 2007-05-29cancelled 2007-11-26
Successor callsigns
Callsigns held now by people who previously held AB9PX.
- Klein, William CWIgranted 2008-01-15cancelled 2010-05-28