Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4CAT callsign genealogy
Currently held by HARTLEY, CATHERINE F
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 KO4CAT's current licensee, walking backwards.
- HARTLEY, CATHERINE FSCgranted 2008-10-20cancelled 2008-11-08
Successor callsigns
Callsigns held now by people who previously held KO4CAT.
No current licensee on record previously held this callsign.