Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4WTF callsign genealogy
Currently held by Ortiz-Rosa, Hiram
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 KP4WTF's current licensee, walking backwards.
- Ortiz-Rosa, HiramPRgranted 2016-12-30cancelled 2017-06-06
Successor callsigns
Callsigns held now by people who previously held KP4WTF.
No current licensee on record previously held this callsign.