DNS records
A CNAME makes one hostname an alias of another hostname. Use it for a subdomain when a provider gives you a target name rather than a fixed IP address.
Hostname aliasPoint one name to another name.
No record conflictsA CNAME cannot share its hostname.
Allow TTL cachingOld answers may remain temporarily.
How it works
For example, a provider may ask for shop.example.uk to be a CNAME of shops.provider.example. Enter only the host portion requested by the DNS Manager and copy the destination accurately.
UKC DNS Manager
Important limits
The root domain normally already has required SOA and NS records, so a conventional CNAME cannot coexist there. Use the A/AAAA values or an approved apex-alias method supplied by the service. A CNAME hostname also cannot carry its own MX or TXT record.
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