Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5ZIY callsign genealogy
Currently held by Koca, James 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 N5ZIY's current licensee, walking backwards.
- Koca, James PTXgranted 2006-05-01cancelled 2007-05-30
Successor callsigns
Callsigns held now by people who previously held N5ZIY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5ZIY, oldest first.
- KOCA, JAMES P TX1996-12-30 → cancelled 2004-03-04
- Koca, James P TX2017-10-07 active