Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CK callsign genealogy
Currently held by Shairrick, Charlie 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 K5CK's current licensee, walking backwards.
- Shairrick, Charlie JARgranted 2016-08-18cancelled 2018-11-24
Successor callsigns
Callsigns held now by people who previously held K5CK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CK, oldest first.
- O MALLEY JR, JOHN J TX2006-08-16 → cancelled 2018-11-06
- Shairrick, Charlie J AR2018-11-24 active