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

K1IU callsign genealogy

Currently held by Kraning, Max 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 K1IU's current licensee, walking backwards.

  1. AD0XZcancelled· E
    Kraning, Max RMNgranted 2017-04-13cancelled 2017-05-31

Successor callsigns

Callsigns held now by people who previously held K1IU.

  1. K1BRactive· E
    SWEENEY, TIMOTHY AMEgranted 2022-03-30
  2. K1AMcancelled· E
    BOUVIER, GERARD FRIgranted 2016-10-25cancelled 2018-05-29

All historical holders

Every license row we've seen with the callsign K1IU, oldest first.

  • SWEENEY, TIMOTHY A ME
    1999-08-04 → cancelled 2002-03-26
  • Cramer, Robert L IA
    2005-05-10 → cancelled 2017-05-11
  • Kraning, Max R MN
    2017-05-31 active
← Back to K1IU License history →