Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4EEE callsign genealogy
Currently held by VAZQUEZ, WILLIAM A
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 KP4EEE's current licensee, walking backwards.
- VAZQUEZ, WILLIAM APRgranted 2020-06-19cancelled 2020-10-06
Successor callsigns
Callsigns held now by people who previously held KP4EEE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4EEE, oldest first.
- VAZQUEZ, WILLIAM PR2005-08-26 → cancelled 2017-03-22
- VAZQUEZ, WILLIAM A PR2020-10-06 active