Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SYY callsign genealogy
Currently held by GRAYSTON, CHARLES M
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 K4SYY's current licensee, walking backwards.
- GRAYSTON, CHARLES MMDgranted 1998-11-19cancelled 2008-08-01
Successor callsigns
Callsigns held now by people who previously held K4SYY.
No current licensee on record previously held this callsign.