Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9XT callsign genealogy
Currently held by MASON, THOMAS 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 AA9XT's current licensee, walking backwards.
- MASON, THOMAS OILgranted 1996-04-15cancelled 2000-04-21
Successor callsigns
Callsigns held now by people who previously held AA9XT.
- MASON, THOMAS OOHgranted 2021-05-29