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

K0JCK callsign genealogy

Currently held by KULLMAN, JOHN C

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 K0JCK's current licensee, walking backwards.

  1. KB0HAZcancelled· E
    KULLMAN, JOHN CKSgranted 2012-09-22cancelled 2019-10-18

Successor callsigns

Callsigns held now by people who previously held K0JCK.

  1. WJ0Bactive· E
    KULLMAN, JOHN CKSgranted 2020-02-15
  2. KB0HAZcancelled· E
    KULLMAN, JOHN CKSgranted 2012-09-22cancelled 2019-10-18

All historical holders

Every license row we've seen with the callsign K0JCK, oldest first.

  • KULLMAN, JOHN C KS
    2004-02-07 → cancelled 2012-09-22
  • KULLMAN, JOHN C KS
    2019-10-18 → cancelled 2020-02-15
← Back to K0JCK License history →