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Comment by Symbiote

The apex domain can only use A records, i.e. point directly to an IP address. It can have multiple A records, ebay.com does so:

  host ebay.com
  ebay.com has address 66.135.216.190
  ebay.com has address 66.211.162.12
  ebay.com has address 66.211.181.123
  ebay.com has address 66.211.185.25
  ebay.com has address 66.211.160.86
  ebay.com has address 66.135.209.52

Without a CNAME (alias) record, eBay need to control the DNS resolution. Most people using a CDN don't, so they must use a subdomain.

parent Symbiote 9 years ago

Comment by Symbiote

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