Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4OH callsign genealogy
Currently held by HERNANDEZ CALERO, OMAR 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 WP4OH's current licensee, walking backwards.
- Hernandez-Calero, Omar APRgranted 2015-10-26cancelled 2015-11-14
Successor callsigns
Callsigns held now by people who previously held WP4OH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4OH, oldest first.
- RIVERA DE LOPEZ, AIDA J PR1988-05-10 → cancelled 2000-05-11
- HERNANDEZ CALERO, OMAR A PR2025-12-06 active