Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OCY callsign genealogy
Currently held by COOK, MATTHEW A
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 K4OCY's current licensee, walking backwards.
- Cook, Matthew ATNgranted 2014-02-11cancelled 2015-08-14
Successor callsigns
Callsigns held now by people who previously held K4OCY.
No current licensee on record previously held this callsign.