Why isn't a subdomain working?

Generally, a subdomain does not work on Cloudflare because it hasn't been added it to your zone file for the domain.

To add a subdomain, review How do I add a subdomain.

Your subdomain DNS record should be either an A record (you need the IP address  to point to) or a CNAME (you need another subdomain for it to point to).

For example:

  • A record - your blog points to a server IP address
  • CNAME record - your blog is an alias for another domain or subdomain
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