See the public IP address your connection uses on the internet.
Network and IP tools
See your public IP, look up any IP address, test open ports and check whether a site is down.
Find the country and network (ASN) behind any IP address.
Check whether a website responds from our server and inspect the response.
Test whether a port on your own connection can be reached from the internet.
Network questions these tools answer
"Is it me or is it the site?"
Is It Down? loads the site from our server and tells you which step failed: DNS, the connection, the certificate or the web server. If it works from here, the problem is likely between you and the site.
"What address am I using?"
What Is My IP shows the public address websites see, which you need when allowing your connection through a server firewall or checking that a VPN works.
"Why can nobody reach my server at home?"
The Open Port Checker tests whether a port on your own connection is reachable from the internet, which confirms port forwarding for game servers, cameras and self-hosted apps. For safety, it only tests your own address.