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

KD1YP callsign genealogy

Currently held by Sullivan, Mark

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 KD1YP's current licensee, walking backwards.

  1. N1TDGactive· T
    Gunn, Tristan DCTgranted 2016-09-07
  2. KB1MNMcancelled· T
    Gunn, Tristan DCTgranted 2005-07-22cancelled 2005-08-16

Successor callsigns

Callsigns held now by people who previously held KD1YP.

  1. WG9Wactive· E
    Sullivan, MarkMAgranted 2025-01-14
← Back to KD1YP License history →