What Is an IP Address?

An IP address is a number assigned to every device connected to a network. It works like a mailing address: when data travels across the internet, it needs to know where to go and where to come back from. IP addresses provide that information.

IP stands for Internet Protocol — the set of rules that governs how data is sent between devices.

What an IP Address Looks Like

Most IP addresses you encounter look like four numbers separated by dots: 192.168.1.1 or 74.125.224.72. This format is called IPv4, and it has been the standard since the early days of the internet.

A newer format, IPv6, looks like this: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. IPv6 was introduced because the internet ran out of IPv4 addresses — there are only about 4.3 billion possible combinations, which sounded like plenty in the 1970s.

Public vs. Private IP Addresses

You actually have two kinds of IP addresses in typical use:

Public IP address: This is the address your home network presents to the rest of the internet. Websites you visit see this address. It is assigned by your internet provider and may change periodically.

Private IP address: Inside your home network, each device (your laptop, your phone, your smart TV) gets its own private address. These addresses are only meaningful within your local network. Your router manages the translation between private and public addresses.

When you check "what is my IP address" online, you see your public address. When you check your device's network settings, you see its private address — usually something starting with 192.168. or 10..

Why Your IP Address Changes

Most home internet connections use a dynamic IP address — one that your provider can change at any time, and often does when you restart your router. This is normal and does not affect how the internet works for most people.

Businesses and servers often pay for static IP addresses that never change. This matters when you need to reliably direct traffic to a specific location, such as hosting a website.

What Your IP Address Reveals

Your IP address reveals your approximate location — usually down to the city level, sometimes more specific, sometimes less. It does not reveal your street address or your name. Websites use it for basic analytics, regional content, and fraud detection.

A VPN can mask your real IP address by routing your traffic through a different server, making websites see the VPN server's address instead of yours.

Summary

An IP address is a number that identifies a device on a network, enabling data to be sent and received correctly. Your home has a public IP address visible to the internet and private addresses for each device internally. Most home addresses change periodically — this is normal. For more on how domain names connect to IP addresses, see what DNS is.