# CNAME

### Set up your custom domain (CNAME)

You can use your own subdomain (like `experts.yourcompany.com`) to access your ExpertFile content. Setting this up only takes a few minutes.

#### Step 1: Choose your subdomain

Enter the **subdomain** you want to use in the field below.

**Examples:**

* `experts.yourcompany.com`
* `insights.yourcompany.com`
* `newsroom.yourcompany.com`

<figure><img src="/files/EmVm3eJRXtdd96csQ9BZ" alt=""><figcaption></figcaption></figure>

> ⚠️ Note: You must use a **subdomain**. Root domains (like `yourcompany.com`) are not supported.

#### Step 2: Update your DNS settings

Log in to your DNS provider (such as GoDaddy, Cloudflare, Namecheap, or your hosting provider) and create a new **CNAME record**.

Use the following values:

| Setting            | Value                                 |
| ------------------ | ------------------------------------- |
| **Type**           | CNAME                                 |
| **Host / Name**    | Your chosen subdomain (e.g. `expert`) |
| **Target / Value** | `greenlock.expertfile.com`            |
| **TTL**            | Default or Auto                       |

Save your changes.

***

#### Step 3: Wait for DNS to propagate

DNS changes can take anywhere from a few minutes up to 24 hours to fully propagate, depending on your provider.

Once propagation is complete, your custom domain will automatically become active and secured with HTTPS.

***

#### Need help?

If you’re unsure where to add a CNAME record, check your DNS provider’s help docs or contact our support team—we’re happy to help you get set up.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developer.expertfile.com/reference/cname.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.