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

WB4SDF callsign genealogy

Currently held by ASDF 2BDE Commo

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 WB4SDF's current licensee, walking backwards.

  1. KJ4DHMcancelled
    ASDF 2BDE CommoALgranted 2008-04-15cancelled 2008-05-09

Successor callsigns

Callsigns held now by people who previously held WB4SDF.

  1. KD4CAPactive
    ASDF 2BDE CommoALgranted 2016-01-26
← Back to WB4SDF License history →