uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K9DO callsign genealogy

Currently held by MOORE, DAVID C

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 K9DO's current licensee, walking backwards.

  1. KC9EUXcancelled· E
    GRACZYK, RENAE MILgranted 2003-09-30cancelled 2007-01-04

Successor callsigns

Callsigns held now by people who previously held K9DO.

  1. K9DACcancelled· E
    CARTER, DAVID AKSgranted 2004-11-30cancelled 2005-01-04
  2. K0DSTexpired· E
    MOORE, DAVID CARgranted 2002-08-20cancelled 2014-08-21

All historical holders

Every license row we've seen with the callsign K9DO, oldest first.

  • MOORE, DAVID C IL
    1999-09-30 → cancelled 2002-08-20
  • CARTER, DAVID A KS
    2004-09-17 → cancelled 2004-11-30
  • GRACZYK, RENAE M IL
    2016-10-17 active
← Back to K9DO License history →