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

AC9SX callsign genealogy

Currently held by MADRIGAL, JOSE R

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 AC9SX's current licensee, walking backwards.

  1. K9CHHcancelled· E
    MADRIGAL, JOSE RILgranted 2018-04-21cancelled 2018-04-26
  2. AC9SLcancelled· E
    MADRIGAL, JOSE RILgranted 2018-02-24cancelled 2018-04-21
  3. AC9SHcancelled· E
    MADRIGAL, JOSE RILgranted 2018-02-24cancelled 2018-03-22
  4. WK6Kactive· E
    Juergen, StorchTXgranted 2022-07-19
  5. AI5IBcancelled· E
    Storch, JuergenTXgranted 2022-06-30cancelled 2022-07-19

Successor callsigns

Callsigns held now by people who previously held AC9SX.

  1. AK9AAcancelled· E
    MADRIGAL, JOSE RILgranted 2018-05-15cancelled 2018-10-10
← Back to AC9SX License history →