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

K4VZ callsign genealogy

Currently held by Mehringer, Mathias J

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 K4VZ's current licensee, walking backwards.

  1. KF0Vactive· E
    Davis IV, John RVAgranted 2025-08-30
  2. N4MRTcancelled· E
    Davis IV, John RVAgranted 2024-05-10cancelled 2025-08-30
  3. KG5JIKcancelled· G
    Davis IV, John RVAgranted 2015-09-15cancelled 2024-05-10

Successor callsigns

Callsigns held now by people who previously held K4VZ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4VZ, oldest first.

  • Mehringer, Mathias J TX
    2007-08-28 → cancelled 2016-05-17
  • Venturi, Franco DE
    2018-06-05 active
← Back to K4VZ License history →