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

K4RDH callsign genealogy

Currently held by Henning, Robert D

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 K4RDH's current licensee, walking backwards.

  1. K1KRHcancelled· G
    Henning, Robert DKYgranted 2012-04-06cancelled 2012-06-16
  2. KK4HTIcancelled· G
    Henning, Robert DKYgranted 2012-03-15cancelled 2012-04-06

Successor callsigns

Callsigns held now by people who previously held K4RDH.

  1. N6DHexpired· E
    Heine III, Raymond DFLgranted 2012-02-28cancelled 2024-03-09

All historical holders

Every license row we've seen with the callsign K4RDH, oldest first.

  • Heine III, Raymond D AZ
    2001-02-16 → cancelled 2002-03-08
  • Henning, Robert D KY
    2022-04-07 active
← Back to K4RDH License history →