CNAME Lookup

Find the CNAME a hostname aliases to. Enter a host such as www.example.com and the lookup shows the canonical name it points to, with the TTL. If there is no CNAME, the tool tells you the name resolves directly to an address instead. The query runs live against a public DNS resolver over a secure connection from your browser, and results may be cached.

Look up a hostname to see the CNAME it aliases to. Records come from a public resolver over a secure connection and may be cached (TTL).

How it works

  1. 1

    Enter a hostname

    Type the host you want to check, often a www or subdomain like www.example.com or app.example.com.

  2. 2

    Look up the CNAME

    Press Look up. A public resolver returns the canonical name the host aliases to, if any.

  3. 3

    Read the target

    The result shows the alias and what it points to, with the TTL. If there is no CNAME, the host points straight at an address.

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Frequently asked questions

What is a CNAME record?
A CNAME (canonical name) makes one hostname an alias for another. When a resolver hits a CNAME, it restarts the lookup at the target name to find the actual address. CNAMEs are common for www, CDNs and hosted services, where you point a name at a provider’s hostname rather than a fixed IP.
Why does my domain have no CNAME?
A name that points straight at an address has an A or AAAA record, not a CNAME, so the lookup reports that it resolves directly. Root domains in particular usually cannot use a CNAME at all under the standard, which is why www often has one while the bare domain does not.
Can a CNAME point to another CNAME?
Yes, alias chains are allowed: one CNAME can target a host that is itself a CNAME, and the resolver follows the chain until it reaches an address record. Long chains add lookups and latency, so providers usually keep them short. The result here shows the first hop in that chain.

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