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What are CNAME records?

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What are CNAME records?

CNAME records are aliases of, or redirect to, other DNS entries.

If domain.com points to 123.124.125.126 and you set up www.domain.com as a CNAME of domain.com – www.domain.com will now also point to 123.124.125.126

When are CNAME records used?

Most commonly, CNAME records are used to map the www. version of a domain to the root domain. For example, you would use a CNAME record to map www.domain.com to domain.com so when people visit www.domain.com they are pointed to domain.com.

Why use CNAME records?

It is quite common to find that everything you have related to a domain is hosted in the same place – The website, mail, localhost, webmail, etc. will all use the same IP.

You could set up a specific record for each of these things, but if they ever changed every single one would need updating separately. With CNAME’s you would only need to update the original records, the rest would draw their information from that one record.

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