Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CIS callsign genealogy
Currently held by HELM, BRIAN P
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 K5CIS's current licensee, walking backwards.
- HELM, BRIAN PTXgranted 2013-11-18cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held K5CIS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CIS, oldest first.
- MOORE, WILLIAM R CA1996-06-29 → cancelled 2008-07-01
- HELM, BRIAN P TX2019-02-20 active