Find the canonical name (CNAME) record and full alias chain for any host name.
How to use CNAME Lookup
Enter a host name such as www.example.com or shop.example.com.
Click Find CNAME to follow each alias until a name with its own addresses is reached.
Read the chain to confirm the alias points where your hosting, CDN or SaaS provider asked.
Worked example
Checking www.github.com shows it is a CNAME for github.com, followed by github.com’s IP address. A missing CNAME for shop.example.com after setting up a store means the record has not been added or has not spread yet.
What is a CNAME record?
A canonical name record makes one host name an alias of another. Visitors to the alias are sent to wherever the target name points.
Can the root domain have a CNAME?
Not in standard DNS, because the root must also hold SOA and NS records. Many DNS hosts offer ALIAS, ANAME or CNAME flattening to get the same effect.
Put this guide into practice
CNAME Lookup — Find the canonical name (CNAME) record and full alias chain for any host name.