Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4CAS callsign genealogy
Currently held by Castillo-Velez, Heriberto
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 KP4CAS's current licensee, walking backwards.
- Castillo-Velez, HeribertoPRgranted 2019-07-10cancelled 2019-07-30
Successor callsigns
Callsigns held now by people who previously held KP4CAS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4CAS, oldest first.
- IRIZARRY SUAREZ, JOSE L PR2004-07-01 → cancelled 2016-09-14
- Castillo-Velez, Heriberto PR2019-07-30 active