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

N9GU callsign genealogy

Currently held by ISON, JOHNNY T

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 N9GU's current licensee, walking backwards.

  1. AB9SOcancelled· E
    AUGSBURGER, DEREK CINgranted 2021-03-11cancelled 2023-08-08
  2. W9RYNcancelled· E
    AUGSBURGER, DEREK CINgranted 2001-05-08cancelled 2008-11-25
  3. N9RYNcancelled· T
    AUGSBURGER, DEREK CINgranted 1993-01-19cancelled 2001-05-08

Successor callsigns

Callsigns held now by people who previously held N9GU.

  1. WJ9Iactive· E
    Ison, Johnny TILgranted 2021-05-25

All historical holders

Every license row we've seen with the callsign N9GU, oldest first.

  • ISON, JOHNNY T IL
    2017-01-09 → cancelled 2021-05-25
  • AUGSBURGER, DEREK C IN
    2023-08-08 active
← Back to N9GU License history →