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

KI0W callsign genealogy

Currently held by Johnston, Jeff 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 KI0W's current licensee, walking backwards.

  1. W0QXRcancelled· E
    Johnston, Jeff RMNgranted 2016-09-27cancelled 2018-12-14
  2. KE0KGZcancelled· T
    Johnston, Jeff RMNgranted 2016-09-01cancelled 2016-09-27

Successor callsigns

Callsigns held now by people who previously held KI0W.

  1. K0CAactive· E
    AHRENS, CLIFFORD HMOgranted 2017-03-09

All historical holders

Every license row we've seen with the callsign KI0W, oldest first.

  • HOLM, LARRY R ND
    2009-04-07 → cancelled 2016-11-01
  • Johnston, Jeff R MN
    2018-12-14 active
← Back to KI0W License history →