Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4SDJ callsign genealogy
Currently held by DELGADO RIVERA, MARIA C
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 KM4SDJ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KM4SDJ.
- DELGADO RIVERA, MARIA CPRgranted 2016-03-10cancelled 2017-06-24