Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4CER callsign genealogy
Currently held by OPPENHEIMER, JUAN
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 KP4CER's current licensee, walking backwards.
- OPPENHEIMER, JUANcancelled 1999-02-10
Successor callsigns
Callsigns held now by people who previously held KP4CER.
No current licensee on record previously held this callsign.