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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KN4OI callsign genealogy

Currently held by BUMPOUS III, EARLE T

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 KN4OI's current licensee, walking backwards.

  1. N4ZNX
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KN4OI.

  1. KN4KKactive· A
    BUMPOUS III, EARLE TTNgranted 2018-12-28
← Back to KN4OI License history →