Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5ZAP callsign genealogy
Currently held by Hiller, Joshua S
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 KC5ZAP's current licensee, walking backwards.
- Hiller, Joshua SMAgranted 2024-01-31cancelled 2024-02-21
Successor callsigns
Callsigns held now by people who previously held KC5ZAP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5ZAP, oldest first.
- HILLER, JOSHUA S AR1997-02-20 → cancelled 2009-02-21
- Hiller, Joshua S MA2024-02-21 active