What Is an IP Address?
An Internet Protocol address is a numerical label used to identify a network interface and help data reach the correct destination. When you open a website, send a message, or stream a video, networks need addressing information so packets can travel between your device, routers, service providers, and remote servers.
Why computers need addresses
Human beings remember names such as example.com more easily than long numbers. Computers ultimately exchange traffic with numerical addresses. The Domain Name System, commonly called DNS, connects these two systems by translating a domain name into one or more IP addresses.
An IP address serves two broad purposes. First, it identifies an interface on a network. Second, it helps routers decide where packets should go next. It is useful to think of an address as routing information rather than a permanent personal identity.
IPv4 and IPv6
IPv4 addresses contain four decimal numbers separated by dots, such as 192.0.2.10. Each number is an eight-bit octet between 0 and 255. IPv6 uses hexadecimal groups separated by colons, such as 2001:db8::10. IPv6 provides a vastly larger address space and supports modern network growth.
Public and private addresses
A public IP can be routed across the internet. A private IP is intended for a local network such as a home, office, or school. Home routers commonly use Network Address Translation so several private devices can share one public address when communicating with the internet.
Can an IP identify a person?
Not reliably. An IP may be shared by a household, company, cellular carrier, VPN service, or public hotspot. Location databases are estimates and can be wrong. Only an internet provider or service operator with appropriate records may be able to associate an address with an account at a particular time, and that does not necessarily prove who used the device.
How to use this site safely
Use forward DNS to understand which addresses a domain publishes. Use reverse DNS to see whether an IP owner configured a PTR hostname. Neither result grants access to a system or proves ownership by a specific person.