Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4ABX callsign genealogy
Currently held by ZAMORA, JUAN B
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 KP4ABX's current licensee, walking backwards.
- LaFontaine-Sanchez, AlexanderPRgranted 2017-11-30cancelled 2017-12-23
Successor callsigns
Callsigns held now by people who previously held KP4ABX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4ABX, oldest first.
- ZAMORA, JUAN B PR1998-06-15 → cancelled 2010-06-16
- LaFontaine-Sanchez, Alexander PR2017-12-23 active