Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KV4CX callsign genealogy
Currently held by O'Brien, Jeff L
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 KV4CX's current licensee, walking backwards.
- O BRIEN, JEFF LALgranted 1999-02-08cancelled 1999-12-02
Successor callsigns
Callsigns held now by people who previously held KV4CX.
No current licensee on record previously held this callsign.