Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI4CAT callsign genealogy
Currently held by Hammond, John G
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 KI4CAT's current licensee, walking backwards.
- Baldwin, Harold JFLgranted 2007-01-26cancelled 2013-09-06
Successor callsigns
Callsigns held now by people who previously held KI4CAT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI4CAT, oldest first.
- Hammond, John G FL2003-08-22 → cancelled 2011-08-18
- Baldwin, Harold J FL2024-03-23 active