Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4MLR callsign genealogy
Currently held by CARABALLO, FILBERTO
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 KP4MLR's current licensee, walking backwards.
- CARABALLO, FILBERTOPRgranted 2003-08-21cancelled 2011-09-30
Successor callsigns
Callsigns held now by people who previously held KP4MLR.
No current licensee on record previously held this callsign.