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

AI4GD callsign genealogy

Currently held by Forrest, Mark B

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 AI4GD's current licensee, walking backwards.

  1. KB4MFDcancelled· E
    Forrest, Mark BTNgranted 2003-07-04cancelled 2004-07-15
  2. KI4AUJcancelled· T
    Forrest, Mark BTNgranted 2003-06-12cancelled 2003-07-04

Successor callsigns

Callsigns held now by people who previously held AI4GD.

  1. AK4MFactive· E
    Forrest, Mark BTNgranted 2024-07-10
← Back to AI4GD License history →