Your built-in Squarespace domain is automatically created with your site, appearing as yoursiteid.squarespace.com. This URL serves as your site's default address before adding a custom domain.

While logged in, you'll always see your built-in domain in the browser address bar, even with a custom domain connected. Visitors will see your custom domain instead, though they can still find the built-in domain through the login screen or source code.

Key Differences:

• Built-in domain: Automatically assigned, ends in .squarespace.com
• Custom domain: Your chosen address (e.g., yourdomain.com), displays to visitors

Finding Your Built-in Domain: Simply copy the URL from your browser's address bar before "/config" while logged into your site.

Changing Your Built-in Domain: Requirements:

• 3-30 characters long
• Letters, numbers, and hyphens only
• Must begin with a letter
• Can't end with a hyphen
• No special characters or symbols

To Change Your Site ID:

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

Once saved, 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 domain from your removed sites.

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