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

KR4CSH callsign genealogy

Currently held by Bordenkircher, Tom

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 KR4CSH's current licensee, walking backwards.

  1. K4NXScancelled· T
    Bordenkircher, TomSCgranted 2023-01-14cancelled 2025-03-29
  2. KD4SIXcancelled· T
    Bordenkircher, TomSCgranted 2022-04-26cancelled 2023-01-14
  3. K4EEOactive· G
    Ridgeway, George AFLgranted 2026-02-10
  4. KC2HOVcancelled· G
    Ridgeway, George AFLgranted 2020-12-04cancelled 2026-02-10

Successor callsigns

Callsigns held now by people who previously held KR4CSH.

  1. K4GZRactive· T
    Bordenkircher, TomSCgranted 2025-05-16
← Back to KR4CSH License history →