Cloudflare has updated its authoritative DNS service to support nine new record types, including DNSKEY, DS, Certificate Related Record Types (SSHFP, TLSA, SMIMEA, CERT), PTR, NAPTR, and URI. These records are less commonly used but provide additional security features such as enabling DNSSEC on subdomains, restricting TLS certificates for a host, and specifying which keys are allowed to be used for a given domain when connecting via TLS. The support of these new record types enhances the flexibility and adoption of Cloudflare's DNS services for customers who need to delegate subdomains or require additional security measures.