Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4AJK callsign genealogy
Currently held by ORTIZ, MARIO Q
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 KP4AJK's current licensee, walking backwards.
- BONILLA ARCE, NELSONPRgranted 2013-11-27cancelled 2021-08-03
Successor callsigns
Callsigns held now by people who previously held KP4AJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4AJK, oldest first.
- ORTIZ, MARIO Q PR1997-01-13 → cancelled 2009-01-14
- BONILLA ARCE, NELSON PR2021-08-03 active