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

K4JSM callsign genealogy

Currently held by Manos, John S

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 K4JSM's current licensee, walking backwards.

  1. KJ4NWAcancelled· T
    Mayeres, Jeremy SFLgranted 2009-07-30cancelled 2011-07-23

Successor callsigns

Callsigns held now by people who previously held K4JSM.

  1. N2KPZcancelled· E
    Manos, John SFLgranted 2009-07-03cancelled 2010-04-24
  2. N2KPZcancelled· E
    Manos, John SFLgranted 2005-01-22cancelled 2008-02-12

All historical holders

Every license row we've seen with the callsign K4JSM, oldest first.

  • Manos, John S FL
    2003-12-02 → cancelled 2005-01-22
  • Manos, John S FL
    2008-02-12 → cancelled 2009-07-03
  • MAYERES, JEREMY S FL
    2021-07-15 active
← Back to K4JSM License history →