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

W9NF callsign genealogy

Currently held by Heiser, Mark R

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 W9NF's current licensee, walking backwards.

  1. KD9MHcancelled· E
    Heiser, Mark RINgranted 2014-07-12cancelled 2016-12-24
  2. KD9AQYcancelled· E
    Heiser, Mark RINgranted 2014-03-13cancelled 2014-07-12

Successor callsigns

Callsigns held now by people who previously held W9NF.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W9NF, oldest first.

  • DOLESHAL, JOHN R WI
    2005-12-28 → cancelled 2016-12-06
  • Heiser, Mark R IN
    2016-12-24 active
← Back to W9NF License history →