Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9ALT callsign genealogy
Currently held by Downham, Walter L
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 W9ALT's current licensee, walking backwards.
- Dorth, GlennINgranted 2020-06-29cancelled 2021-01-05
Successor callsigns
Callsigns held now by people who previously held W9ALT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9ALT, oldest first.
- Downham, Walter L IN2007-11-16 → cancelled 2020-02-11
- Dorth, Glenn IN2021-01-05 active