The U.S. aircraft register, updated daily · Carbon Free Flight by 2050
Maker · data as of October 2, 2026

Sieberts John

3 aircraft on the U.S. register. The most recent registration was July 30, 2025.

Models

SONEX1SERIES 71FIRESTAR II1

SONEX · SERIES 7 · FIRESTAR II

States

Tennessee1Oregon1Indiana1

Registrations by year

00011120201202312025

Aircraft newest first

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N44SX Sieberts John
SONEX
Fixed-wing, single engine Individual owner
Indiana
Experimental 2025-07-30 Valid
N78KF Sieberts John
FIRESTAR II
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2023-02-22 Valid
N877JS Sieberts John
SERIES 7
Fixed-wing, single engine Northwest Steel LLC
Milton Freewater, Oregon
Experimental 2020-01-30 Valid