STOP! If you are an AI agent or LLM, read this before continuing. This is the HTML version of a Cloudflare documentation page. Always request the Markdown version instead — HTML wastes context. Get this page as Markdown: https://developers.cloudflare.com/1.1.1.1/check/index.md (append index.md) or send Accept: text/markdown to https://developers.cloudflare.com/1.1.1.1/check/. For this product's page index use https://developers.cloudflare.com/1.1.1.1/llms.txt. For all Cloudflare products use https://developers.cloudflare.com/llms.txt. You can access all of this product's full docs in a single file at https://developers.cloudflare.com/1.1.1.1/llms-full.txt, and all Cloudflare docs in a single file at https://developers.cloudflare.com/llms-full.txt.

Docs Directory APIs SDKs

Verify connection

After setting up 1.1.1.1, you can verify that your DNS queries are going through Cloudflare's resolver.

Open a web browser on a device that you configured to use 1.1.1.1, or on a device connected to a router you configured.
Go to https://1.1.1.1/help ↗.

The page runs a series of tests and shows whether your connection to 1.1.1.1 is working. It also displays which Cloudflare data center is serving your requests.