Ports are an essential part of network connections. Learn what is a port, how computer ports work, and how to identify them by port number.

The port scanner tool will provide you with information regarding valid methods of connect to network. Scan a network to find any open ports.

What is my IP? Instantly check your public IP address. My IP address location information shows city, state, postal code, country, and ISP.

Port forwarding, also known as port mapping, gives external network access to devices within your private network. It makes external connections much easier and ensures that your router won't block …

Understand localhost - and the 127.0.0.1 IP address - in this guide to take the first step to mastering computer networking.

Instantly check IP address location details like country, ISP, city, state/region, postal code, and time zone for any IP address.

The TCP/IP model is essential to digital communications. Learn what the model is, why it's used, and how the TCP/IP layers are divided.

Our IP Tools are free* to use. Tools include IP Address Lookup, IP WHOIS Lookup, Hostname Lookup, Server Headers Check, Blacklist Check, Traceroute, User Agent Info, IP Widget

Use the IP WHOIS lookup tool to find the assigned owner, location, and abuse-reporting details of an IP address.

Port address translation (PAT) Also known as NAT overload, port address translation is by far the most popular version of NAT, typically used within homes. PAT assigns a single public IP address to a …