Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KY1A callsign genealogy
Currently held by MUANGAMPHUN, CHALERMPOL
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 KY1A's current licensee, walking backwards.
- MUANGAMPHUN, CHALERMPOLCTgranted 2007-04-10cancelled 2007-11-27
Successor callsigns
Callsigns held now by people who previously held KY1A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KY1A, oldest first.
- DIAZ JR, JOSEPH CT1995-01-13 → cancelled 2007-01-17
- MUANGAMPHUN, CHALERMPOL CT2017-10-12 active