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

KM9Z callsign genealogy

Currently held by Kiesewetter, Marco M

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 KM9Z's current licensee, walking backwards.

  1. K7GAFcancelled· E
    Kiesewetter, Marco MAZgranted 2020-01-31cancelled 2022-12-06
  2. KJ7LOJcancelled· T
    Kiesewetter, Marco MAZgranted 2020-01-13cancelled 2020-01-31

Successor callsigns

Callsigns held now by people who previously held KM9Z.

  1. KK9Ractive· E
    ENGLISH, MAC AINgranted 2020-11-10

All historical holders

Every license row we've seen with the callsign KM9Z, oldest first.

  • ENGLISH, MAC A FL
    2020-03-18 → cancelled 2020-11-10
  • Kiesewetter, Marco M AZ
    2022-12-06 active
← Back to KM9Z License history →