Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4LT callsign genealogy
Currently held by VELAZQUEZ, ISAIAS
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 WP4LT's current licensee, walking backwards.
- TRILLA FLORES, LIONELPRgranted 2023-06-27cancelled 2025-06-17
Successor callsigns
Callsigns held now by people who previously held WP4LT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4LT, oldest first.
- VELAZQUEZ, ISAIAS PR1987-09-29 → cancelled 1999-09-30
- TRILLA FLORES, LIONEL PR2025-06-17 active