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

KD9MZ callsign genealogy

Currently held by TORBENSON, ROBERT L

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 KD9MZ's current licensee, walking backwards.

  1. AC9QQcancelled· E
    ZYSKOWSKI, MICHAEL EILgranted 2016-06-08cancelled 2017-06-10
  2. KD9GKZcancelled· E
    ZYSKOWSKI, MICHAEL EILgranted 2016-06-08cancelled 2017-05-22

Successor callsigns

Callsigns held now by people who previously held KD9MZ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KD9MZ, oldest first.

  • TORBENSON, ROBERT L WI
    1994-10-19 → cancelled 2006-10-20
  • ZYSKOWSKI, MICHAEL E IL
    2017-06-10 active
← Back to KD9MZ License history →