Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9AH callsign genealogy
Currently held by Oldenburg, Jon W
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 AB9AH's current licensee, walking backwards.
- OLDENBURG, JON WWIgranted 1999-09-22cancelled 2000-09-19
Successor callsigns
Callsigns held now by people who previously held AB9AH.
No current licensee on record previously held this callsign.