Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4GSI callsign genealogy
Currently held by SIEVENS IRIZARRY, GREISHA
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 KP4GSI's current licensee, walking backwards.
- SIEVENS IRIZARRY, GREISHAPRgranted 2020-02-24cancelled 2020-03-24
Successor callsigns
Callsigns held now by people who previously held KP4GSI.
No current licensee on record previously held this callsign.