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

KD9WW callsign genealogy

Currently held by Peterson, Ralph L

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 KD9WW's current licensee, walking backwards.

  1. AC9VHcancelled· E
    Donvig, KatherineWIgranted 2019-05-13cancelled 2019-07-27
  2. KD9NEQcancelled· E
    Donvig, KatherineWIgranted 2019-05-13cancelled 2019-06-14

Successor callsigns

Callsigns held now by people who previously held KD9WW.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KD9WW, oldest first.

  • Peterson, Ralph L IL
    2005-12-20 → cancelled 2018-03-13
  • Donvig, Katherine WI
    2019-07-27 active
← Back to KD9WW License history →