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

AJ0S callsign genealogy

Currently held by Opificius, Julian 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 AJ0S's current licensee, walking backwards.

  1. KE0WUEcancelled· E
    Rosburg, Dennis LNEgranted 2019-09-13cancelled 2021-07-02

Successor callsigns

Callsigns held now by people who previously held AJ0S.

  1. N4JOactive· E
    Opificius, Julian AMNgranted 2019-05-21
  2. AA7EOcancelled· E
    HUBBARD, JERREL PNVgranted 2017-04-01cancelled 2018-10-30

All historical holders

Every license row we've seen with the callsign AJ0S, oldest first.

  • JOHNS, ROBERT J AR
    2003-09-19 → cancelled 2015-12-01
  • HUBBARD, JERREL P CO
    2015-12-19 → cancelled 2017-04-01
  • Opificius, Julian A MN
    2019-04-27 → cancelled 2019-05-21
  • Rosburg, Dennis L NE
    2021-07-02 active
← Back to AJ0S License history →