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

KD1X callsign genealogy

Currently held by Merck, Ryan 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 KD1X's current licensee, walking backwards.

  1. W1XVXcancelled· E
    Segerson, Philip JMAgranted 2021-01-26cancelled 2021-12-03
  2. KC1OKEcancelled· G
    Segerson, Philip JMAgranted 2021-01-07cancelled 2021-01-26

Successor callsigns

Callsigns held now by people who previously held KD1X.

  1. W1UMactive· E
    Merck, Ryan DMAgranted 2019-11-13

All historical holders

Every license row we've seen with the callsign KD1X, oldest first.

  • BENEDETTI, JAMES A FL
    2005-10-17 → cancelled 2014-10-02
  • Merck, Ryan D MA
    2016-10-21 → cancelled 2019-11-13
  • Segerson, Philip J MA
    2021-12-03 active
← Back to KD1X License history →