Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4ETO callsign genealogy
Currently held by Tirado-Ortiz, Efren
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 WP4ETO's current licensee, walking backwards.
- Tirado-Ortiz, EfrenPRgranted 2018-10-19
Successor callsigns
Callsigns held now by people who previously held WP4ETO.
- Tirado-Ortiz, EfrenPRgranted 2018-10-19