Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4RDS callsign genealogy
Currently held by DIAZ, REYNALDO
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 KP4RDS's current licensee, walking backwards.
- DIAZ, REYNALDOPRgranted 2025-09-30cancelled 2026-06-26
Successor callsigns
Callsigns held now by people who previously held KP4RDS.
- DIAZ, REYNALDOPRgranted 2025-09-30cancelled 2026-06-26
All historical holders
Every license row we've seen with the callsign KP4RDS, oldest first.
- DIAZ, REYNALDO PR2016-07-26 → cancelled 2025-09-30
- DIAZ, REYNALDO PR2026-06-26 active