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Confidence: Medium · Source: FCC ULS · As of 2026-09-11

AF4DF callsign genealogy

Currently held by KNUEPPEL, LOUIS B

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 AF4DF's current licensee, walking backwards.

  1. KT4RAcancelled· E
    OWENS, ROGER AALgranted 2003-03-25cancelled 2003-05-28
  2. K4YKXcancelled· E
    OWENS, ROGER AALgranted 2003-05-28cancelled 2003-10-18

Successor callsigns

Callsigns held now by people who previously held AF4DF.

No current licensee on record previously held this callsign.

← Back to AF4DF License history →