Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4YI callsign genealogy
Currently held by RIVERA, EDWIN
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 KP4YI's current licensee, walking backwards.
- RIVERA, EDWINPRgranted 2014-04-28cancelled 2014-06-07
Successor callsigns
Callsigns held now by people who previously held KP4YI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4YI, oldest first.
- RIVERA, EDWIN PR2001-09-25 → cancelled 2013-11-20
- RIVERA, EDWIN PR2024-03-26 active