Error Code Portal
CloudflareCloudflare HTTP errorsError code

1001

Error 1001: DNS resolution error

Alternative forms: Error 1001

What does this code mean?

Code 1001 · An issue reported by Cloudflare HTTP errors.

Official explanation · Original text

This error indicates a DNS resolution failure preventing access to the requested domain. - A web request was sent to a Cloudflare IP address for a non-existent Cloudflare domain. - An external domain that is not on using Cloudflare has a CNAME record to a domain active on Cloudflare - The target of the DNS CNAME record does not resolve. - A CNAME record in your Cloudflare DNS app requires resolution via a DNS provider that is currently offline.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Error 1001: DNS resolution error ↗

Creator: Cloudflare, Inc. and contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Selected introductory official description; Markdown stripped; original Korean product context added. Direct official error page retains the complete cause and resolution instructions.

Source details · Original licenses and notices