CNAME (Canonical Name) RecordThe CNAME (Canonical Name) record is used to define an alias host name. Format:
alias.domain.name. IN CNAME otherhost.domain.name.
This defines alias.domain.name as an alias for the host whose canonical (standard)
name is otherhost.domain.name.
Note: A hostname that exists as a CNAME cannot have any other DNS records applied to it. For example, if your domain is called philosophy.arizona.edu, and it is separately nameserved (so that it has its own SOA and NS records), then you can't give philosophy.arizona.edu a CNAME record. To send mail to anyuser@philosophy.arizona.edu, you need to use MX and/or A records.
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