Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4TU callsign genealogy
Currently held by OYOLA SOTO, JUAN R
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 KP4TU's current licensee, walking backwards.
- OYOLA SOTO, JUAN RPRgranted 2012-10-05cancelled 2022-07-26
Successor callsigns
Callsigns held now by people who previously held KP4TU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4TU, oldest first.
- ORTIZ RODRIGUEZ, NICOMEDES PR1992-07-21 → cancelled 2004-07-22
- OYOLA SOTO, JUAN R PR2022-07-26 active