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

KO4DU callsign genealogy

Currently held by ALL, DANNY M

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 KO4DU's current licensee, walking backwards.

  1. KC4YDS
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KO4DU.

  1. W4ALLactive· A
    ALL, DANNY MSCgranted 2019-10-18
← Back to KO4DU License history →