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

K9TSA callsign genealogy

Currently held by JOHNSON, MARC 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 K9TSA's current licensee, walking backwards.

  1. N9QXCcancelled· G
    JOHNSON, MARC SINgranted 1992-08-18cancelled 2002-08-28
  2. KB9HNS
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held K9TSA.

No current licensee on record previously held this callsign.

← Back to K9TSA License history →