Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD9A callsign genealogy
Currently held by KIOUS, CHAD J
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 WD9A's current licensee, walking backwards.
- KIOUS, CHAD JTXgranted 2002-01-15cancelled 2010-07-09
Successor callsigns
Callsigns held now by people who previously held WD9A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD9A, oldest first.
- DALRYMPLE, MICHAEL S IN1998-05-27 → cancelled 2010-05-28
- KIOUS, CHAD J TX2020-06-20 active