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

AB7DY callsign genealogy

Currently held by Madlem, Andrew

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 AB7DY's current licensee, walking backwards.

  1. AG7ZQcancelled· E
    Madlem, AndrewORgranted 2019-01-31cancelled 2020-03-14
  2. KJ7DGJcancelled· E
    Madlem, AndrewORgranted 2019-01-31cancelled 2020-02-25

Successor callsigns

Callsigns held now by people who previously held AB7DY.

  1. KE7Xactive· E
    Madlem, AndrewORgranted 2021-06-07
  2. AA7Oterminated· E
    Madlem, AndrewORgranted 2020-08-25cancelled 2020-12-31
  3. N7VGexpired· E
    GREGORY, VERNON CNMgranted 1997-08-21cancelled 2009-08-22

All historical holders

Every license row we've seen with the callsign AB7DY, oldest first.

  • Madlem, Andrew OR
    2020-03-14 → cancelled 2021-06-07
  • —
    — → cancelled 1997-08-21
← Back to AB7DY License history →