is working but subdomain.domain.com is showing servers IP address could not be found. www.subdomain.domain.com
I created A type records for
subdomain . domain . com
Regardless of your DNS, you cannot use CF with two-level-deep subdomains like
www.sub.example.com without purchasing a certificate via ACM. See
This tutorial covers a possible reason for the SSL_ERROR_NO_CYPHER_OVERLAP and ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors (Firefox and Chrome respectively) when seen on a subdomain.
The Cloudflare universal certificates cover example.com and *.example.com. This means that it covers any subdomain one level below the domain you signed up with.
It will cover www.example.com and subdomain.example.com, as these are one level below the root domain, example.com.
The certificate will not cover www.sub…
If you do want to try it, you can create a DNS where the name is “www.subdomain” (and the target is the same IP as the existing non-www subdomain) and it’ll correctly create the two-level-deep DNS record.
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