Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4YO callsign genealogy
Currently held by OLAN, YARITZA
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 WP4YO's current licensee, walking backwards.
- OLAN, YARITZAPRgranted 2023-02-28cancelled 2023-03-21
Successor callsigns
Callsigns held now by people who previously held WP4YO.
- RODRIGUEZ, BILLYPRgranted 2023-06-27
All historical holders
Every license row we've seen with the callsign WP4YO, oldest first.
- RODRIGUEZ, BILLY PR2000-12-27 → cancelled 2003-03-15
- OLAN, YARITZA PR2023-03-21 active