HTTP 203 Non-Authoritative Information

What it means

Non-Authoritative Information describes how the server processed the request and what the client should do next.

Why it happens

Common triggers include protocol conditions, routing decisions, and application behavior.

Common causes

• Normal protocol behavior

How to fix it

• No fix needed

Example request/response

GET /example HTTP/1.1
Host: errorlookup.com

HTTP/1.1 203 Non-Authoritative Information

Browser/dev/server context

Use browser network tools, server logs, and APM traces together when diagnosing HTTP 203.

Related status codes

FAQ

Is HTTP 203 officially assigned?

Yes. This code is assigned in the IANA registry.