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

KM5KS callsign genealogy

Currently held by SINCLAIR, JOHN W

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 KM5KS's current licensee, walking backwards.

  1. WY7JScancelled· E
    SINCLAIR, JOHN WWYgranted 2020-02-29cancelled 2021-12-24
  2. AE7FRcancelled· E
    SINCLAIR, JOHN WWYgranted 2006-06-08cancelled 2010-04-13

Successor callsigns

Callsigns held now by people who previously held KM5KS.

  1. AE7FRcancelled· E
    SINCLAIR, JOHN WWYgranted 2006-06-08cancelled 2010-04-13

All historical holders

Every license row we've seen with the callsign KM5KS, oldest first.

  • SINCLAIR, JOHN W WY
    2006-06-08 → cancelled 2010-03-19
  • SINCLAIR, JOHN W WY
    2021-12-24 active
← Back to KM5KS License history →