Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4MC callsign genealogy
Currently held by CALDERON MATOS, VICTOR J
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 KP4MC's current licensee, walking backwards.
- CALDERON MATOS, VICTOR JPRgranted 2013-11-18cancelled 2014-05-06
Successor callsigns
Callsigns held now by people who previously held KP4MC.
- Diaz Alequin, PabloPRgranted 2019-09-25
All historical holders
Every license row we've seen with the callsign KP4MC, oldest first.
- RODRIGUEZ, CARLOS PR1987-08-18 → cancelled 1999-08-20
- Diaz-Alequin, Pablo PR2004-01-16 → cancelled 2009-10-07
- CALDERON MATOS, VICTOR J PR2026-04-09 active