Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KP4KB callsign genealogy
Currently held by Pastrana Diaz, Rafael
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 KP4KB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4KB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4KB, oldest first.
- Pastrana Diaz, Rafael PR2001-03-23 → cancelled 2013-03-26
- Santiago Rivera, Samuel PR2024-07-04 active