Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4LDR callsign genealogy
Currently held by RIVERA, LUIS D
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 WP4LDR's current licensee, walking backwards.
- RIVERA, LUIS DPRgranted 2023-11-21cancelled 2023-12-19
Successor callsigns
Callsigns held now by people who previously held WP4LDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4LDR, oldest first.
- COLON, HECTOR M PR1992-05-19 → cancelled 2004-05-20
- RIVERA, LUIS D PR2023-12-19 active