Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4COS callsign genealogy
Currently held by Perry, Kenneth R
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 K4COS's current licensee, walking backwards.
- PERRY, KENNETH RGAgranted 2010-06-17cancelled 2010-11-06
Successor callsigns
Callsigns held now by people who previously held K4COS.