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

KS6J callsign genealogy

Currently held by ROWLEY, KARL P

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 KS6J's current licensee, walking backwards.

  1. N6KAAcancelled· E
    ROWLEY, KARL PCAgranted 2023-11-14cancelled 2024-02-09
  2. KG6MAWcancelled· G
    ROWLEY, KARL PCAgranted 2022-07-22cancelled 2023-11-14

Successor callsigns

Callsigns held now by people who previously held KS6J.

  1. AE6Factive· E
    ROWLEY, KARL PCAgranted 2024-09-21
  2. K3IScancelled· E
    OKA, NOBUTAKACAgranted 2019-10-08cancelled 2021-10-01

All historical holders

Every license row we've seen with the callsign KS6J, oldest first.

  • O DONNELL, JAMES F CA
    1995-10-23 → cancelled 2007-10-24
  • OKA, NOBUTAKA CA
    2008-12-06 → cancelled 2009-12-29
  • Harper, Jerry E CA
    2012-01-21 → cancelled 2024-01-23
  • ROWLEY, KARL P CA
    2024-02-09 → cancelled 2024-09-21
← Back to KS6J License history →