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

K2AU callsign genealogy

Currently held by HOROWITZ, 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 K2AU's current licensee, walking backwards.

  1. W2YMXcancelled· E
    HOROWITZ, MARK SFLgranted 2002-12-03cancelled 2003-03-04
  2. WA2YMXcancelled· E
    HOROWITZ, MARK SFLgranted 2001-07-13cancelled 2002-12-03

Successor callsigns

Callsigns held now by people who previously held K2AU.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K2AU, oldest first.

  • MARSHALL, JOSEPH NY
    1998-03-24 → cancelled 1998-10-22
  • HOROWITZ, MARK S FL
    2022-12-07 active
← Back to K2AU License history →