IP and DNS tools
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Your IP address is:

If you want to host some sort of communication, such as an online game or webcam session, this is the address that you must give to someone else who needs to connect to your computer. Some of the software, who gives you that information directly, will report a wrong address if you are behind a router or firewall. Getting your IP address from a website such as this one ensures it's validity.

Other tools

Convert IP → DNS

Enter an IP address below in the XXX.XXX.XXX.XXX
format in order to get the matching DNS data.

Convert DNS → IP

Enter a DNS data below to get the matching IP address.