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

AI0H callsign genealogy

Currently held by SMITH, ROGER D

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 AI0H's current licensee, walking backwards.

  1. KF0FQVcancelled· E
    Breitbarth, ChristianMNgranted 2021-05-14cancelled 2023-06-23

Successor callsigns

Callsigns held now by people who previously held AI0H.

  1. WX0DXcancelled· E
    SMITH, ROGER DMOgranted 2021-06-04cancelled 2021-12-21

All historical holders

Every license row we've seen with the callsign AI0H, oldest first.

  • DAVIDSON, DAVID S MO
    2008-08-12 → cancelled 2020-09-17
  • SMITH, ROGER D MO
    2020-10-06 → cancelled 2021-06-04
  • Breitbarth, Christian MN
    2023-06-23 active
← Back to AI0H License history →