To connect a third-party subdomain to your Squarespace site, follow this step-by-step guide:

Before Starting:

• Ensure you have a registered domain with full DNS services
• Set up your subdomain with your provider first
• Note that connecting the main domain isn't required to connect a subdomain

Step 1: Initialize Connection in Squarespace

1. Go to the Domains panel
2. Click "I already have a domain"
3. Enter your subdomain name
4. Click "Connect from provider"
5. Select "Other" from the dropdown
6. Click "Connect Domain"
7. Keep the DNS Settings panel open for reference

Step 2: Access Your Domain Provider

• Log into your domain account
• Navigate to DNS settings (may be called Zone File Settings or Domain Manager)

Step 3: Add First CNAME Record

• Host: [Your verification code].subdomain
• Type: CNAME
• Points to: verify.squarespace.com

Step 4: Add Second CNAME Record

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

Step 5: Verify Connection

1. Return to Squarespace DNS settings
2. Click "Refresh Records"
3. Wait for verification (up to 72 hours)

Step 6: Final Configuration If using as primary domain:

1. Open Domains panel
2. Click the subdomain
3. Disable "Use WWW prefix" option

Troubleshooting Tips:

• If CNAME records aren't supported, use TXT records instead
• Remove conflicting A records
• Verify DNS settings through the Domains panel
• Allow up to 72 hours for changes to take effect

For providers not supporting CNAME:

1. Use TXT records instead
2. Follow same pointing structure
3. Ensure records match Squarespace's requirements

Note: The "www" CNAME will show "Record not found" even after successful connection - this is normal.

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