Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4KZ callsign genealogy
Currently held by SERRANO COLON, OSVALDO
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 KP4KZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4KZ.
- Rodriguez Salcedo, David EPRgranted 2024-07-06
All historical holders
Every license row we've seen with the callsign KP4KZ, oldest first.
- SERRANO COLON, OSVALDO PR1996-06-05 → cancelled 2008-06-06
- Rodriguez Salcedo, David E PR2022-06-10 → cancelled 2024-07-06