What Is an IP Address?
An IP address is a number or label that lets internet-connected devices send information to the right network connection.
How it works
When you open a website, your browser needs an address for the server and the server needs a return address for your connection. Your public IP is the address normally visible to websites you contact. A home router may share one public address between many devices, while each device also has a separate local address on the home network. An IP address identifies a connection or network route; it is not a precise identity card for a person.
A useful example is a video call. Your device asks DNS for the service address, opens a connection from its current network address, and receives media back over that route. The site does not need to know your name merely because it receives an IP, although an account login can add that context.
NAT is why several people at home can visit the same site and appear to share a public IPv4 address. IPv6 can work differently because devices may have globally routable addresses, but websites still see the route used for that request rather than a complete picture of the household.
Practical guidance
- Use a public-IP checker when you need the address seen by a website or support service.
- Use your device network settings when you need a local Wi-Fi or Ethernet address.
- Treat location based on an IP as approximate, especially on mobile networks or when using a VPN.
Common question
Can someone find my exact home address from an IP? Usually no. IP data can often suggest an ISP and broad area, but it is not a street-address lookup.