Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4AF callsign genealogy
Currently held by GONZALEZ CRUZ, ERNESTO
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 KP4AF's current licensee, walking backwards.
- GUZMAN, CARLOS RPRgranted 2016-07-22cancelled 2018-03-30
Successor callsigns
Callsigns held now by people who previously held KP4AF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4AF, oldest first.
- GONZALEZ CRUZ, ERNESTO PR1998-04-06 → cancelled 2010-04-07
- GUZMAN, CARLOS R PR2018-03-30 active