NTSTATUS Lookup

1,799 NTSTATUS values from Microsoft's own [MS-ERREF] specification. Search by hex code (with or without 0x), decimal — including the negative signed form Windows sometimes logs — or a symbolic name/description fragment. Runs entirely client-side; nothing you type is sent anywhere.

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A quick note on duplicates

NTSTATUS is a 32-bit value with a handful of legacy duplicate assignments — a small number of hex codes below map to more than one symbolic name (typically an older, more generic name alongside a newer one describing the same underlying condition more precisely). Where that happens, every name sharing that code is listed rather than picking one arbitrarily.

Where this data comes from

Parsed directly from the return-value table in Microsoft's own Open Specifications documentation for [MS-ERREF], not retyped or guessed. If Microsoft revises the spec, this table can go stale until it's re-pulled — if something here looks wrong for a code you're certain about, the spec page linked above is the source of truth.