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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KA9KOJ callsign genealogy

Currently held by Todd, David 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 KA9KOJ's current licensee, walking backwards.

  1. KG9RBactive· E
    Todd, David BINgranted 2026-08-18
  2. AC9XHcancelled· E
    Todd, David BINgranted 2018-01-26cancelled 2026-08-18

Successor callsigns

Callsigns held now by people who previously held KA9KOJ.

  1. AC9XHcancelled· E
    Todd, David BINgranted 2018-01-26cancelled 2026-08-18
  2. KG9RBcancelled· E
    Todd, David BINgranted 2008-10-31cancelled 2018-01-26

All historical holders

Every license row we've seen with the callsign KA9KOJ, oldest first.

  • TODD, DAVID B IN
    1999-01-13 → cancelled 2004-08-26
  • Todd, David B IN
    2018-01-26 → cancelled 2020-07-21
← Back to KA9KOJ License history →