Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WI9USA callsign genealogy
Currently held by WALSH, ISAAC D
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 WI9USA's current licensee, walking backwards.
- Walsh, Isaac DWIgranted 2007-03-07cancelled 2007-04-03
Successor callsigns
Callsigns held now by people who previously held WI9USA.
No current licensee on record previously held this callsign.