Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4LH callsign genealogy
Currently held by COFRESI RADIO CLUB
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 KP4LH's current licensee, walking backwards.
- WP4NRTcancelledCOFRESI RADIO CLUBPRgranted 2006-04-12cancelled 2008-08-26
Successor callsigns
Callsigns held now by people who previously held KP4LH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4LH, oldest first.
- DIAZ ARMSTRONG, ARTURO F PR1996-07-18 → cancelled 2008-07-19
- COFRESI RADIO CLUB PR2018-12-07 active