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

K1SJ callsign genealogy

Currently held by JONES, SIDNEY B

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 K1SJ's current licensee, walking backwards.

  1. K1TOFcancelled· E
    Gerard, Christophe JMAgranted 2018-09-24cancelled 2022-08-19
  2. KB1RGLcancelled· E
    Gerard, Christophe JMAgranted 2008-10-16cancelled 2008-12-13

Successor callsigns

Callsigns held now by people who previously held K1SJ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K1SJ, oldest first.

  • JASUT, STANLEY W CT
    1987-08-25 → cancelled 1999-09-01
  • JONES, SIDNEY B CA
    2010-04-24 → cancelled 2022-07-01
  • Gerard, Christophe J MA
    2022-08-19 active
← Back to K1SJ License history →