Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4UBE callsign genealogy
Currently held by JACOBSEN, JOHN S
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 N4UBE's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4UBE.
No current licensee on record previously held this callsign.