To connect a third-party subdomain to Squarespace:

Before You Begin:

• Ensure you have a registered domain with Full DNS services
• Set up your subdomain with your provider first
• Note: You don't need to connect the main domain before connecting a subdomain

Step-by-Step Connection Process:

1. Start in Squarespace

• Go to Domains panel
• Click "Use a Domain I Own"
• Enter subdomain name
• Click "Connect From Provider"
• Select "Other" from dropdown
• Click "Connect Domain"
• Keep DNS Settings panel open for reference

2. Access DNS Settings

• Log into your domain provider account
• Find DNS management section (may be called Zone File Settings, Manage Domains, or DNS Manager)

3. Add First CNAME Record

• Host: Copy unique verification code from Squarespace
• Type: CNAME
• Points to: verify.squarespace.com

4. Add Second CNAME Record

• Host: Your subdomain (e.g., "blog")
• Type: CNAME
• Points to: ext-cust.squarespace.com

5. Complete Setup

• Return to Squarespace DNS Settings
• Click "Refresh records"
• Wait up to 72 hours for changes to process
• If using as primary domain, disable "Use WWW Prefix" in Domains panel

Troubleshooting Tips:

If CNAME Records Aren't Supported:

• Use TXT records instead
• Follow same format for both records
• Delete any conflicting A records

If Verification Fails:

• Use DNS checker tool in Domains panel
• Remove any conflicting A records
• Wait up to 72 hours for changes to take effect
• Contact domain provider if issues persist

The connection is complete when the subdomain successfully directs to your Squarespace site.

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