Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI5HOY callsign genealogy
Currently held by Guzardo, Mark R
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 KI5HOY's current licensee, walking backwards.
- Guzardo, Mark RARgranted 2013-11-21cancelled 2019-12-18
Successor callsigns
Callsigns held now by people who previously held KI5HOY.
No current licensee on record previously held this callsign.