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

K4DI callsign genealogy

Currently held by MARTIN, GERALD 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 K4DI's current licensee, walking backwards.

  1. KJ4Yactive· E
    Jackson, Mark EVAgranted 2016-11-16
  2. AI4LIcancelled· E
    Jackson, Mark EVAgranted 2002-06-27cancelled 2006-11-14
  3. KG4UAVcancelled· E
    Jackson, Mark EVAgranted 2002-06-27cancelled 2005-07-22

Successor callsigns

Callsigns held now by people who previously held K4DI.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4DI, oldest first.

  • MARTIN, GERALD T FL
    1998-01-15 → cancelled 2002-09-03
  • Lineberger, James M GA
    2014-07-09 active
← Back to K4DI License history →