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

KA4DRZ callsign genealogy

Currently held by Duley, Steven E

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 KA4DRZ's current licensee, walking backwards.

  1. AI4MMactive· E
    Mueller, MarkusFLgranted 2023-10-03
  2. KQ4JJCcancelled· E
    Mueller, MarkusFLgranted 2023-06-27cancelled 2023-10-03

Successor callsigns

Callsigns held now by people who previously held KA4DRZ.

  1. AI4MMcancelled· E
    Duley, Steven EKYgranted 2018-02-09cancelled 2019-02-23

All historical holders

Every license row we've seen with the callsign KA4DRZ, oldest first.

  • Duley, Steven E KY
    2010-12-29 → cancelled 2018-02-09
  • Duley, Steven E KY
    2019-02-23 active
← Back to KA4DRZ License history →