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

AC9JK callsign genealogy

Currently held by Krassman, Judith A

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 AC9JK's current licensee, walking backwards.

  1. AB9WUcancelled· E
    Krassman, Judith AWIgranted 2007-11-26cancelled 2010-06-22
  2. KC9MMScancelled· E
    Krassman, Judith AWIgranted 2007-11-26cancelled 2010-06-01

Successor callsigns

Callsigns held now by people who previously held AC9JK.

No current licensee on record previously held this callsign.

← Back to AC9JK License history →