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

KZ3DX callsign genealogy

Currently held by FARRELL, MARK S

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 KZ3DX's current licensee, walking backwards.

  1. W7GSAactive
    Galileo STEM Academy Amateur Radio ClubIDgranted 2019-03-01
  2. W7BDRcancelled
    Digital Amateur Radio Club Of The Treasure ValleyIDgranted 2015-10-16cancelled 2019-03-01
  3. KG7WDHcancelled
    Digital Amateur Radio Club Of The Treasure ValleyIDgranted 2015-09-21cancelled 2015-10-16

Successor callsigns

Callsigns held now by people who previously held KZ3DX.

  1. KD3ZXactive· A
    FARRELL, MARK SPAgranted 2024-09-19

All historical holders

Every license row we've seen with the callsign KZ3DX, oldest first.

  • FARRELL, MARK S PA
    1999-01-13 → cancelled 2004-11-16
  • Erfurth, W A UT
    2018-11-14 active
← Back to KZ3DX License history →