An A-record in DNS translates a domain name (such as www.nucleus.be) to the correct IP address, in this case 77.73.96.106.

To show the A-record of a certain domain, you can do the following:

In windows:
Go to Start, Execute, and enter “cmd” (without quotes)

Press enter, and the Windows Command Prompt will open. This is a black window, which allows you to enter certain commands.

Enter the following command:

Then press enter. A request is now being sent to the DNS server, which will translate the domain name “www.nucleus.be” to its correct IP address. You will receive an answer as follows:

The result is split in two parts. The first two lines will be different to anyone, as this is the server to which the translate-request is sent.

The following 2 rules (Non-authoritive answer) are the result of the translation-request. You will see the domain name that was request (www.nucleus.be) and the IP address to which it was translated (77.73.93.106).

In linux:
In linux you can use a similar way to determine which IP address is attached to what domain. You open a terminal window (the equivalent of the Command Prompt, under Windows). You type “nslookup www.nucleus.be” and receive a request as follows:

The first two lines here are also the DNS server which received the translation request, to determine the correct IP address. The last 2 lines are the actual result of this lookup, with name domain name (www.nucleus.be) and its correct IP address (77.73.96.106).

In this manner, the correct IP address can be discovered that belongs to a certain domain name.

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