Security for everyone

DNS CNAME Record Lookup

CNAME (Canonical Name) is a type of DNS record that is used as an alias for another domain.


Short Info



Single Scan

Single Scan

Can be used by


Estimated Time

5 sec

Scan only one



DNS CNAME Record Lookup

What is DNS ?

DNS (Domain Name System) is a service that translates domain names into IP addresses. Users can easily remember domain names, but computers only understand IP addresses that’s why we need DNS. For example, without this service, you have to type '' in your browser instead of to access Facebook. IP - Domain mappings are kept on DNS servers. You can query those matches on

There are two types of IP addresses IPv4, and IPv6. IPv4 address looks like these:


IPv6 addressed looks like these (all of them are the same IP):



CNAME (Canonical Name) is a type of DNS record that is used as an alias for another domain. Let's give a real-life example. You bought a domain such as then you offer an online email service. To do that you've created a new subdomain such as However, you found out that some email clients use the webmail subdomain as default. In that case, you can use a CNAME record to map to CNAME records must point to a domain name, not an IP address.

Also, another example of using CNAME records is using multiple ports of the same IP addresses. You can use (21), (8080), (80,443) on the same IP addresses. All of them can point to in the CNAME records. With that, when you move your server to another IP address you have to change's A record only.

How to Test DNS CNAME Record?

Simple. Write your domain on the form at the top of the page to check cname records, that's all. Using Security for Everyone’s free cname lookup, you can get cname records and find all cname records for a domain as well as cname record check. Generally, people use CNAME to points to another subdomain or main domain. You can use DNS CNAME lookup tool to get them.

Or if you are using a Linux or an OS X operating system, open the terminal and type dig -t cname If your domain has a valid cname record, it would look like that:

          dig -t cname
          ;; ANSWER SECTION:

If you are using Windows open PowerShell and type Resolve-DnsName -Name -Type cname.

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