Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0USP callsign genealogy
Currently held by Cowan, William 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 K0USP's current licensee, walking backwards.
- Cowan, William JMOgranted 2011-12-21cancelled 2019-04-12
Successor callsigns
Callsigns held now by people who previously held K0USP.
No current licensee on record previously held this callsign.