Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4KZG callsign genealogy
Currently held by LOPEZ LUGO, WILLIAM
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 WP4KZG's current licensee, walking backwards.
- LOPEZ LUGO, WILLIAMPRgranted 2023-04-29cancelled 2023-05-19
Successor callsigns
Callsigns held now by people who previously held WP4KZG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4KZG, oldest first.
- LOPEZ LUGO, WILLIAM PR2003-07-25 → cancelled 2014-03-25
- LOPEZ LUGO, WILLIAM PR2023-05-19 active