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

AB9RO callsign genealogy

Currently held by ARMA, BASEERO

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 AB9RO's current licensee, walking backwards.

  1. N0JBTcancelled· E
    ARMA, BASEEROCAgranted 2016-03-09cancelled 2019-11-13
  2. KG6ZTXcancelled· T
    ARMA, BASEEROCAgranted 2005-06-29cancelled 2006-03-04

Successor callsigns

Callsigns held now by people who previously held AB9RO.

  1. W0SDRactive· E
    Langenhuysen, Robert GNCgranted 2018-08-08

All historical holders

Every license row we've seen with the callsign AB9RO, oldest first.

  • Langenhuysen, Robert G WI
    2008-07-03 → cancelled 2008-07-25
  • ARMA, BASEERO CA
    2019-11-13 active
← Back to AB9RO License history →