Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4CSL callsign genealogy
Currently held by SERPA, CARLOS J
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 KP4CSL's current licensee, walking backwards.
- SERPA, CARLOS JPRgranted 2003-06-03cancelled 2003-08-12
Successor callsigns
Callsigns held now by people who previously held KP4CSL.
No current licensee on record previously held this callsign.