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

KC4SG callsign genealogy

Currently held by GALPER, JEFFREY 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 KC4SG's current licensee, walking backwards.

  1. KD8BGcancelled· A
    GALPER, JEFFREY SFLgranted 2013-12-05cancelled 2018-06-05
  2. N8DNW
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KC4SG.

  1. K2GEJactive· A
    GRIEBNO, CARL SSCgranted 2022-06-02

All historical holders

Every license row we've seen with the callsign KC4SG, oldest first.

  • GRIEBNO, CARL S SC
    2003-01-17 → cancelled 2012-08-17
  • GALPER, JEFFREY S FL
    2018-06-05 active
← Back to KC4SG License history →