Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4LRD callsign genealogy
Currently held by NEGRON, GERARDO
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 KP4LRD's current licensee, walking backwards.
- NEGRON VAZQUEZ, GEREMIASPRgranted 2022-11-16cancelled 2023-05-19
Successor callsigns
Callsigns held now by people who previously held KP4LRD.
- NEGRON, GERARDOPRgranted 2021-02-06
All historical holders
Every license row we've seen with the callsign KP4LRD, oldest first.
- NEGRON, GERARDO PR2019-02-06 → cancelled 2021-02-06
- NEGRON VAZQUEZ, GEREMIAS PR2023-05-19 active