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

AB0XS callsign genealogy

Currently held by SCHLESINGER, MAX E

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 AB0XS's current licensee, walking backwards.

  1. KM0XScancelled· E
    SCHLESINGER, MAX EMOgranted 2019-01-01cancelled 2019-12-24
  2. KE0OCBcancelled· E
    SCHLESINGER, MAX EMOgranted 2017-08-01cancelled 2019-01-01

Successor callsigns

Callsigns held now by people who previously held AB0XS.

  1. KS0Pactive· E
    Kiefhaber, Kathryn RCOgranted 2024-03-16

All historical holders

Every license row we've seen with the callsign AB0XS, oldest first.

  • Kiefhaber, Kathryn R CO
    2001-02-27 → cancelled 2003-10-17
  • SCHLESINGER, MAX E MO
    2019-12-24 active
← Back to AB0XS License history →