Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4HCO callsign genealogy
Currently held by BORTZ, JOSHUA
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 K4HCO's current licensee, walking backwards.
- MACHADO, JEREMIAH LVAgranted 2023-03-21cancelled 2023-04-18
Successor callsigns
Callsigns held now by people who previously held K4HCO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4HCO, oldest first.
- BORTZ, JOSHUA FL1997-06-24 → cancelled 2002-06-06
- MACHADO, JEREMIAH L VA2023-04-18 active