Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5CST callsign genealogy
Currently held by N5CST
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 N5CST's current licensee, walking backwards.
- KF5TXPcancelledLCEM CSTOKgranted 2013-02-20cancelled 2015-03-10
Successor callsigns
Callsigns held now by people who previously held N5CST.
- GYLLENBAND, JOHANN FTXgranted 2012-12-11cancelled 2024-12-12
All historical holders
Every license row we've seen with the callsign N5CST, oldest first.
- GYLLENBAND, JOHANN F TX2005-08-31 → cancelled 2012-12-11
- N5CST OK2025-02-12 active