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

K1RTR callsign genealogy

Currently held by COOK, RICHARD J

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 K1RTR's current licensee, walking backwards.

  1. KJ6RTQcancelled· G
    CSIK, STEVEN CCAgranted 2011-10-06cancelled 2021-04-30

Successor callsigns

Callsigns held now by people who previously held K1RTR.

  1. K6FZcancelled· E
    COOK, RICHARDCAgranted 2018-07-17cancelled 2020-08-04
  2. W7RTRactive· G
    RAPER, ROLLIE TWAgranted 2018-03-14

All historical holders

Every license row we've seen with the callsign K1RTR, oldest first.

  • RAPER, ROLLIE T WA
    2008-03-18 → cancelled 2008-05-16
  • COOK, RICHARD J CA
    2011-10-12 → cancelled 2018-07-17
  • CSIK, STEVEN C CA
    2021-04-30 active
← Back to K1RTR License history →