Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9A callsign genealogy
Currently held by YODER, RALPH O
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 AB9A's current licensee, walking backwards.
- Davis Jr, Clay MCAgranted 2010-02-16cancelled 2010-06-02
Successor callsigns
Callsigns held now by people who previously held AB9A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB9A, oldest first.
- YODER, RALPH O IN1998-05-04 → cancelled 2010-05-05
- Davis Jr, Clay M CA2020-05-05 active