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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

WD4DT callsign genealogy

Currently held by RIDDLE JR, RICHARD W

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 WD4DT's current licensee, walking backwards.

  1. WC7CTcancelled· A
    RIDDLE JR, RICHARD WFLgranted 2019-02-15cancelled 2019-04-12
  2. KJ7SVcancelled· A
    RIDDLE JR, RICHARD Wcancelled 1997-10-15

Successor callsigns

Callsigns held now by people who previously held WD4DT.

No current licensee on record previously held this callsign.

← Back to WD4DT License history →