SINT - What is my IP address and port?

If you want to see your IP address without advertisements or unnecessary additional text or pictures, you can use: niekde.sk/ip
You can use it with cli tools for example like that:

$ curl niekde.sk/ip

If you want to see a little bit more detailed info about your connection, you can use niekde.sk/coninfo

You can see there your IP address, source port of your outgoing HTTP request, your hostname (if you have any) and user agent string from your web browser.

Feel free to use these tools.