---
description: Node.js APIs from the node:dns, node:net, and node:timers modules are now available when using nodejs_compat.
title: Support for Node.js DNS, Net, and Timer APIs in Workers
image: https://developers.cloudflare.com/changelog/post/2025-01-28-nodejs-compat-improvements/og.png?v=cdfe693d5ae5a7b8
---

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January 28, 2025

## Support for Node.js DNS, Net, and Timer APIs in Workers

[Workers](https://developers.cloudflare.com/workers/)

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2025-01-28-nodejs-compat-improvements/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

When using a Worker with the [`nodejs_compat`](https://developers.cloudflare.com/workers/runtime-apis/nodejs/) compatibility flag enabled, you can now use the following Node.js APIs:

- [`node:net`](https://developers.cloudflare.com/workers/runtime-apis/nodejs/net/)
- [`node:dns`](https://developers.cloudflare.com/workers/runtime-apis/nodejs/dns/)
- [`node:timers`](https://developers.cloudflare.com/workers/runtime-apis/nodejs/timers/)

#### node:net

You can use [`node:net` ↗︎](https://nodejs.org/api/net.html) to create a direct connection to servers via a TCP sockets with [`net.Socket` ↗︎](https://nodejs.org/api/net.html#class-netsocket).

*index.jsjs*

```js
import net from "node:net";

const exampleIP = "127.0.0.1";

export default {
	async fetch(req) {
		const socket = new net.Socket();
		socket.connect(4000, exampleIP, function () {
			console.log("Connected");
		});

		socket.write("Hello, Server!");
		socket.end();

		return new Response("Wrote to server", { status: 200 });
	},
};
```

*index.tsts*

```ts
import net from "node:net";

const exampleIP = "127.0.0.1";

export default {
  async fetch(req): Promise<Response> {
    const socket = new net.Socket();
    socket.connect(4000, exampleIP, function () {
      console.log("Connected");
    });

    socket.write("Hello, Server!");
    socket.end();

    return new Response("Wrote to server", { status: 200 });
  },
} satisfies ExportedHandler;
```

Additionally, you can now use other APIs including [`net.BlockList` ↗︎](https://nodejs.org/api/net.html#class-netblocklist) and [`net.SocketAddress` ↗︎](https://nodejs.org/api/net.html#class-netsocketaddress).

Note that [`net.Server` ↗︎](https://nodejs.org/api/net.html#class-netserver) is not supported.

#### node:dns

You can use [`node:dns` ↗︎](https://nodejs.org/api/dns.html) for name resolution via [DNS over HTTPS](https://developers.cloudflare.com/1.1.1.1/encryption/dns-over-https/) using [Cloudflare DNS ↗︎](https://www.cloudflare.com/application-services/products/dns/) at 1.1.1.1.

*index.jsjs*

```js
import dns from "node:dns";

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

*index.tsts*

```ts
import dns from 'node:dns';

let response = 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.

#### node:timers

You can use [`node:timers` ↗︎](https://nodejs.org/api/timers.html) to schedule functions to be called at some future period of time.

This includes [`setTimeout` ↗︎](https://nodejs.org/api/timers.html#settimeoutcallback-delay-args) for calling a function after a delay, [`setInterval` ↗︎](https://nodejs.org/api/timers.html#setintervalcallback-delay-args) for calling a function repeatedly, and [`setImmediate` ↗︎](https://nodejs.org/api/timers.html#setimmediatecallback-args) for calling a function in the next iteration of the event loop.

*index.jsjs*

```js
import timers from "node:timers";

console.log("first");
timers.setTimeout(() => {
	console.log("last");
}, 10);

timers.setTimeout(() => {
	console.log("next");
});
```

*index.tsts*

```ts
import timers from "node:timers";

console.log("first");
timers.setTimeout(() => {
  console.log("last");
}, 10);

timers.setTimeout(() => {
  console.log("next");
});
```

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