![]() Domains used for email can’t act as CNAME aliases.MX and NS records can’t point to CNAME aliases.It is possible to point one CNAME record to another, but this is not considered a good practice, as it affects performance due to the increased number of DNS requests. ![]() You can’t place a CNAME record for a hostname with other DNS records like A records, NS records, etc.CNAME records can only point to other domain names and never to IP addresses.You can’t place a CNAME record at the root domain level ().There are a couple of restrictions you need to bear in mind when setting CNAME records: It will save you a lot of time reconfiguring every individual subdomain one by one. If you ever need to move the website to a different server, all you’ll need to do is change ’s A record. ![]() CNAME records can be very useful in many scenarios.įor example, suppose all your subdomains (,, ,, etc.) are mapped to, and has an A record pointing it to the server’s IP. If it is configured correctly, will lead users to the server’s IP address, and the web server will serve them the blog section of your website rather than the homepage. You can have a CNAME record for that points to, but this doesn’t necessarily mean that the two will display the same content. The goal of the CNAME is to lead the user to the correct IP address. A redirect reroutes the traffic to a predetermined destination. It’s important to make the distinction between a CNAME record and a redirect. The browser understands that it needs to look for and puts together a second DNS request, eventually resolving to the correct IP. Then, the server responds with the stored CNAME record. The browser sends a request to the DNS resolver and is relayed to the Authoritative Name Server that hosts ’s DNS zone file. ![]() To show you how it works, we’ll look at its most common application – mapping the First, a user enters into their browser. A CNAME record is a DNS record that turns one domain (usually a subdomain) into an alias for another. ![]()
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