Find the canonical domain a hostname aliases to, resolved live from public DNS.
Enter a domain to look up its CNAME records.
A CNAME (Canonical Name) record makes one hostname an alias for another. For example, www.example.com might be a CNAME pointing at example.com, so both resolve to the same place.
CNAMEs are widely used to point subdomains at CDNs, SaaS platforms, and load balancers. This tool shows the canonical target a hostname aliases to.
Traditional DNS does not allow a CNAME on the root (apex) domain because it conflicts with required records like SOA and NS. Many providers offer CNAME flattening or ALIAS/ANAME records as a workaround.
An A record points to an IP address directly. A CNAME points to another hostname, which is then resolved to find the IP. CNAMEs are useful when the target IP may change, since you only update it in one place.
Most hostnames resolve directly via A/AAAA records and have no CNAME. A CNAME only appears when a hostname is explicitly aliased to another name.
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