dns

To enable built-in Node.js APIs and polyfills, add the nodejs_compat compatibility flag to your Wrangler configuration file. This also enables nodejs_compat_v2 as long as your compatibility date is 2024-09-23 or later. Learn more about the Node.js compatibility flag and v2.

You can use node:dns ↗ for name resolution via DNS over HTTPS using Cloudflare DNS ↗ at 1.1.1.1.

JavaScript

index.js

import dns from "node:dns";

let responese = await dns.promises.resolve4("cloudflare.com", "NS");

TypeScript

index.ts

import dns from 'node:dns';

let responese = await dns.promises.resolve4('cloudflare.com', 'NS');

All node:dns functions are available, except lookup, lookupService, and resolve which throw "Not implemented" errors when called.

Note

DNS requests will execute a subrequest, counts for your Worker's subrequest limit.

The full node:dns API is documented in the Node.js documentation for node:dns ↗.