Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4UHF callsign genealogy
Currently held by Serrano Diaz jr, Alberto
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 KP4UHF's current licensee, walking backwards.
- Serrano Diaz jr, AlbertoPRgranted 2019-11-02
Successor callsigns
Callsigns held now by people who previously held KP4UHF.
- Serrano Diaz jr, AlbertoPRgranted 2019-11-02