Built-in domains are automatically generated URLs that Squarespace provides for every site and parking page, following the format: yoursiteid.squarespace.com. The site ID consists of two random words and sometimes additional characters.

While logged in, you'll see your built-in domain in the browser address bar, even with a custom domain connected. Visitors will see your custom domain instead, though the built-in domain remains visible on the login screen and in the source code.

Key Differences:

• Built-in domain: Automatically assigned URL ending in .squarespace.com
• Custom domain: Your chosen web address (e.g., yourdomain.com)

Changing Your Built-in Domain:

Requirements:

• 3-30 characters long
• Must start with a letter
• Can only contain letters, numbers, and hyphens
• Cannot end with a hyphen
• No special characters or symbols allowed

To change your built-in domain:

1. Open the Domains panel
2. Click on your built-in domain
3. Enter a new Site ID
4. Click Save

After saving, you'll receive a confirmation email titled "Your Updated Squarespace URL."

Note: Built-in domains cannot be changed for parking pages or Acuity Scheduling subscriptions. If your desired Site ID is taken, contact Customer Support to reuse a built-in domain from one of your removed sites.

To find your built-in domain for support purposes, copy the URL from your browser's address bar (everything before "/config") while logged into your site.

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