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# SIP domains

> See the SIP domains of your account, which hold the extensions, trunks, and outbound routes.

A SIP domain is the name that groups the telephony objects of your account. Every extension, trunk, and outbound route belongs to one SIP domain. An extension registers its devices against the domain name. Extension numbers only need to be unique inside one domain.

> **Note**
>
> Hams support creates and changes the SIP domains. The **SIP Domains** tab only shows the domains. You cannot add, change, or delete a domain there.

![The SIP Domains tab. Extensions register against the domain listed here.](/_fern-img/d470036390ef7098ad6d240c00770412e053465e24fb1c5f2668a2639092ef17.webp)

## Columns

| Column      | What it shows                                                            |
| ----------- | ------------------------------------------------------------------------ |
| **Domain**  | The domain name. Click the copy icon (**Copy domain**) to copy the name. |
| **Status**  | **Active** or **Inactive**.                                              |
| **Created** | The date of creation.                                                    |
| **Updated** | The date of the last change.                                             |

## Use a domain name

#### Open the SIP Domains tab

Click **Settings** in the Cloud Call Center sidebar. Click the **SIP Domains** tab.

#### Copy the domain name

Click **Copy domain** next to the domain. The page shows **Domain copied**.

#### Enter the name in your device

Enter the domain name as the SIP domain of the device. Use the extension number as the user name.

If the tab shows **No SIP domains provisioned yet.**, ask Hams support to add a domain. You cannot add a trunk, an extension, or an outbound route before a domain exists.

## Related

* [Extensions](/cloud-call-center/settings/extensions)
* [Trunks](/cloud-call-center/settings/trunks)
* [Outbound routes](/cloud-call-center/settings/outbound-routes)