Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WI9SM callsign genealogy
Currently held by SOUTH MILWAUKEE AMATEUR RADIO CLUB INC
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 WI9SM's current licensee, walking backwards.
- WA9TXEcancelledSOUTH MILWAUKEE AMATEUR RADIO CLUB INCWIgranted 2014-06-18cancelled 2019-04-27
Successor callsigns
Callsigns held now by people who previously held WI9SM.
No current licensee on record previously held this callsign.