Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4MRH callsign genealogy
Currently held by ROSARIO, MARIANO
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 KP4MRH's current licensee, walking backwards.
- ROSARIO, MARIANOPRgranted 2024-07-02cancelled 2024-07-23
Successor callsigns
Callsigns held now by people who previously held KP4MRH.
No current licensee on record previously held this callsign.