Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS0USM callsign genealogy
Currently held by O'ROURKE, S MARY E
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 KS0USM's current licensee, walking backwards.
- O'ROURKE, S MARY EKSgranted 2011-06-24cancelled 2011-07-19
Successor callsigns
Callsigns held now by people who previously held KS0USM.
No current licensee on record previously held this callsign.