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

KZ5MM callsign genealogy

Currently held by South Texas Contest Club

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 KZ5MM's current licensee, walking backwards.

  1. KJ5Wactive· E
    SHARP, BERT ETXgranted 2023-06-22
  2. KI5DYIcancelled· E
    SHARP, BERT ETXgranted 2019-03-26cancelled 2023-06-22

Successor callsigns

Callsigns held now by people who previously held KZ5MM.

  1. W5PRactive· E
    DIETZ, CHARLES LTXgranted 2020-10-24

All historical holders

Every license row we've seen with the callsign KZ5MM, oldest first.

  • DIETZ, CHARLES L TX
    1997-09-17 → cancelled 2000-10-31
  • South Texas Contest Club TX
    2019-04-17 active
← Back to KZ5MM License history →