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

KD4SKI callsign genealogy

Currently held by Kadlubowski, Christopher A

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 KD4SKI's current licensee, walking backwards.

  1. KD4DTXcancelled· T
    Kadlubowski, Christopher AINgranted 2015-10-02cancelled 2018-12-14
  2. KM4CPTcancelled· T
    Kadlubowski, Christopher AMIgranted 2014-06-25cancelled 2015-10-02

Successor callsigns

Callsigns held now by people who previously held KD4SKI.

  1. N9ICVactive· T
    Kadlubowski, Christopher AINgranted 2019-05-24

All historical holders

Every license row we've seen with the callsign KD4SKI, oldest first.

  • WILLIAMS, PATRICK C AA
    1992-08-18 → cancelled 2004-08-19
  • Kadlubowski, Christopher A IN
    2018-12-14 → cancelled 2019-05-24
← Back to KD4SKI License history →