Contact your ISP. Telephone or Web site.
Or, were you referring to your computers IP address?
Help and Support returned this:
Find your computer's IP address
You might need your computer's IP address if you set up an Internet
connection, allow other people to connect to your computer, or need to
troubleshoot network problems.
Click to open Network and Sharing Center.
Under Connection, click View status.
Click Details.
Your computer's IP address appears in the Value column, next to "IPV4 IP
Address."