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

W9DO callsign genealogy

Currently held by Cathcart, Gregory D

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 W9DO's current licensee, walking backwards.

  1. N9OWNcancelled· E
    Owen, Dennis OINgranted 2019-04-15cancelled 2019-05-21
  2. KB9MDVcancelled· T
    OWEN, DENNIS Ocancelled 1999-06-16

Successor callsigns

Callsigns held now by people who previously held W9DO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W9DO, oldest first.

  • FRYE, ROLAND F IN
    1996-11-04 → cancelled 2004-03-26
  • Cathcart, Gregory D IL
    2007-05-01 → cancelled 2019-05-02
  • Owen, Dennis O IN
    2019-05-21 active
← Back to W9DO License history →