What Is an IP Address? Meaning, Types & How to Find It

Every time you open a website, send a message, or stream a video, your device needs a way to say "send the reply here." That's the job of an IP address. You rarely see it, but nothing on the internet works without it.

If you run a website or an online business, this is one of those basics that keeps coming up: in hosting settings, DNS records, security logs and analytics. Here's what it is, the different types, and what it does (and doesn't) say about you.

Quick answer: an IP address (Internet Protocol address) is the number that identifies a device on a network, like 192.168.1.5 at home or 203.0.113.7 on the internet. It's used to deliver data to the right device. To find yours, search "what is my IP" for your public IP, or open your device's Wi-Fi settings for its private IP. Rechecked against IANA's special-purpose registry, RFC 1918, Apple and Microsoft network docs, and Cloudflare's explainer on November 8, 2026.

What is an IP address?

An IP address is a number that identifies a device on a network. "IP" stands for Internet Protocol, the set of rules that decides how data is split into packets and delivered between devices.

What is an IP address used for? Three main jobs: delivering web pages, messages and video to the right device; letting devices on your home network find each other (that's how your laptop finds your printer); and letting websites show local content and block abuse.

Think of it like a postal address for your device. When you visit a site, your request carries your IP address, so the server knows where to send the page back. Cloudflare's explainer uses the same idea: no address, no delivery.

You don't type IP addresses yourself because of DNS, which translates names like nilesharma.space into the numbers computers use. A domain is the friendly label; the IP address is where the server actually lives. If you want to see how domains fit into a full web address, read our guide on what a URL is.

IPv4 vs IPv6

There are two versions of IP addresses in use today.

IPv4 is the older format, four numbers from 0 to 255 separated by dots, like 192.0.2.1. It's 32 bits long, which allows about 4.3 billion addresses. That sounded like plenty decades ago. With billions of phones, laptops, TVs and smart devices online, it isn't.

IPv6 was designed to fix that. Addresses are 128 bits long and written as eight groups of hexadecimal characters separated by colons, like 2001:0db8:85a3:0000:0000:8a2e:0370:7334. Long runs of zeros can be shortened with :: (so the example becomes 2001:db8:85a3::8a2e:370:7334). The number of possible IPv6 addresses is so large that running out isn't a practical concern. The protocol itself is defined in RFC 8200.

Both versions run side by side today. Your phone may well have one of each right now. Sites and apps that only speak IPv4 still work through your provider and router; IPv6 is quietly there when both ends support it.

What each number means: in an IPv4 address like 192.168.1.5, each of the four numbers is one byte (0 to 255). The first part identifies the network and the last part identifies the device on it. Where the split falls is set by the subnet mask: with the common home mask 255.255.255.0, 192.168.1 is your network and .5 is your device.

Public vs private IP address

This is where most people get confused, because you actually have more than one IP address.

A public IP address is the one the rest of the internet sees. Your internet provider assigns it to your router, and every device in your home shares it when talking to websites. Search "what is my IP" and that number is your public address.

A private IP address is used only inside your local network. Your router hands one to each device, so your laptop might be 192.168.1.5 and your phone 192.168.1.8. These ranges are reserved for private use by RFC 1918 and confirmed in IANA's private-use help:

• 10.0.0.0 to 10.255.255.255 (10.0.0.0/8)
• 172.16.0.0 to 172.31.255.255 (172.16.0.0/12)
• 192.168.0.0 to 192.168.255.255 (192.168.0.0/16)

Your router translates between the two using NAT (network address translation). That's why thousands of homes can all use 192.168.1.5 without clashing on the public internet.

There's also a related block you may see on mobile networks: 100.64.0.0/10 (Shared Address Space, RFC 6598). Providers use it for carrier-grade NAT, so many phones share one public IP. If your "what is my IP" page shows a public address but Wi-Fi settings show something in 100.64.x.x, that's normal on cellular.

Special IP addresses: 127.0.0.1, 0.0.0.0 and 169.254

Some addresses have a fixed meaning everywhere. They're listed in IANA's special-purpose IPv4 registry (rechecked November 8, 2026):

Address	What it means
127.0.0.1 (and the whole 127.0.0.0/8 block)	Localhost (loopback). Your device talking to itself, used by developers to test apps. Never leaves your computer.
0.0.0.0	"This network" or "no specific address". A server bound to 0.0.0.0 listens on all its addresses.
169.254.x.x (169.254.0.0/16)	Link-local. Your device gave itself this address because it couldn't get one from the router (DHCP failed). Usually a Wi-Fi or cable problem.
10.x, 172.16–31.x, 192.168.x	Private ranges for home and office networks (RFC 1918)
192.0.2.x, 198.51.100.x, 203.0.113.x	Reserved for examples and documentation (RFC 5737)
255.255.255.255	Limited broadcast on the local network

If your computer or phone shows a 169.254 address, forget the Wi-Fi network and rejoin it, or restart the router. On an iPhone that still won't connect, a force restart often clears a stuck network stack.

Static vs dynamic IP address

A dynamic IP address can change. Most home and mobile connections get one from the provider's pool via DHCP, and it may change when your router restarts or after a lease period. It's cheaper for providers and works fine for browsing.

A static IP address stays the same. Businesses use static addresses for servers, VPNs, remote access, or anything where other systems need to find them at a fixed location. Providers usually charge extra for one.

On your home LAN you can also reserve a private address for a printer or NAS in the router's DHCP settings so that device always gets the same private IP without paying for a public static address.

If you host a website on a managed platform, you typically don't need to think about this, because the platform handles the server addresses and you just point your domain at it. On a virtual server you rent yourself, a public IPv4 address can be a separate line on the bill; our guide to cloud infrastructure explains these costs and how to pick a host. (Budgeting a site? Our free website cost calculator shows what hosting and a domain usually cost.)

How to find my IP address

Your public IP: the quickest way is to search "what is my IP" in a search engine, or visit a lookup page such as Cloudflare's. Your router's admin page also shows it, along with your Wi-Fi settings (handy if you need to find your WiFi password).

Your private IP is on the device itself. Steps below for each platform.

iPhone or iPad

1. Open Settings, then tap Wi-Fi.
2. Tap the (i) info button next to the network with the checkmark.
3. Under IPv4 Address, read IP Address. You'll also see Subnet Mask and Router (that router line is the gateway you'll use for admin login).

Apple's Manage Wi-Fi settings on iPhone guide covers the same screen, including Configure IP, Limit IP Address Tracking, and Private Wi-Fi Address. Note: Wi-Fi Address on that screen is the MAC address, not the IP.

iOS does not show your cellular public IP in Settings. Use a "what is my IP" page in Safari while on mobile data for that.

Android

Menu names vary by brand (Pixel, Samsung, Xiaomi, and so on), but the path is similar:

1. Open Settings > Network & internet (or Connections on Samsung).
2. Tap Internet or Wi-Fi, then tap your connected network (or the gear icon).
3. Look for IP address / Network details. Some phones put it under Advanced.

On Samsung Galaxy: Settings > Connections > Wi-Fi > gear next to the network > View more.

Windows 11

Following Microsoft's find-your-IP guidance:

1. Open Settings > Network & internet.
2. Select Wi-Fi or Ethernet, then open the connected network (or Properties).
3. Scroll to IPv4 address. IPv6 and DNS appear on the same page.

Or press Windows + R, type cmd, and run ipconfig. Read IPv4 Address under the active adapter. For more detail (ipconfig /all) also shows DHCP server, lease times and DNS.

Mac

Per Apple's TCP/IP settings guide:

1. Open Apple menu > System Settings > Network.
2. Select Wi-Fi or Ethernet, then click Details.
3. Open the TCP/IP tab. Your address is next to IP address.

You can also click Renew DHCP Lease on that screen to request a fresh private address from the router.

Chromebook

1. Click the clock (status area) at the bottom right, then the Wi-Fi network name, or open Settings > Network.
2. Click your connected network.
3. Expand the network details. The IP address field shows your private IP.

ChromeOS doesn't always surface a one-click public IP view; use a browser "what is my IP" page for that.

How to find the IP address on a printer

Printers get a private IP from your router like any other device. To find it:

• Touchscreen printers: open the Wireless or Network settings menu on the control panel; the IP address is listed there.
• Printers without a screen: print a network configuration or information page from the control panel (on many HP models, press the Information or Wireless button). The IP address is on the printout.
• HP printers: in the HP Smart app, tap your printer, then Network Information (HP's instructions).
• Any brand: your router's admin page lists connected devices and their IP addresses — often the fastest method when the printer UI is confusing.

Once you have the printer's IP, you can type it into a browser to open many printers' built-in web pages for status and settings.

Router admin and common gateway IPs

The Router or Default gateway line on your device's Wi-Fi details is the address of your home router. Type that into a browser's address bar (with http:// if needed) to open the admin page. Common defaults:

Brand / setup	Common gateway
Many home routers	192.168.1.1 or 192.168.0.1
Some ISP gateways	192.168.1.254, 10.0.0.1
Google Nest / some mesh	192.168.86.1
iPhone Personal Hotspot	172.20.10.1

Login credentials are often on a sticker on the router (different from the Wi-Fi password). If you've changed them and forgotten, you may need a factory reset — and you'll also reset the Wi-Fi name and password, so keep our how to find your WiFi password guide handy before you wipe anything.

On the admin page you can usually see: the public WAN IP, every connected device's private IP, DHCP reservations, and port-forwarding rules. That's the same place you'd go to fix a printer that keeps getting a new address.

How to change your IP address

• Public IP: restart your router; with a dynamic IP, your provider may hand out a new one (not guaranteed — some leases stick for days). Switching from Wi-Fi to mobile data also gives you a different public IP. A VPN replaces it with the VPN server's address while connected.
• Private IP on Windows 11: Settings > Network & internet > Wi-Fi > Manage known networks > your network > IP assignment > Edit, then choose Manual only if you know the correct address, mask and gateway. Leave Automatic (DHCP) unless you have a reason not to (Microsoft TCP/IP settings).
• Private IP on Mac: System Settings > Network > your connection > Details > TCP/IP, then change Configure IPv4, or click Renew DHCP Lease to request a fresh address (Apple guide).
• iPhone: Settings > Wi-Fi > (i) > Configure IP. Apple also offers Limit IP Address Tracking on the same screen, which hides your IP from known trackers in Safari and Mail (Apple's iPhone Wi-Fi guide).

Developers often check this when connecting to a database or an API from a server. If that term is new to you, our post on what an API is explains it with everyday examples.

Troubleshooting common IP problems

A 169.254 address is the classic "I'm alone on this wire" signal (RFC 3927 link-local). It almost never means your ISP account is dead — it means your device never reached the router's DHCP server. Fix the local hop first.

If a page still looks broken after you clear browser cache, rule out the network next: confirm you're on the right Wi-Fi and that Settings shows a normal private IP, not 169.254.

What does an IP address tell you?

Less than many people fear, but more than nothing.

A public IP address can usually reveal:

• Your internet provider
• An approximate location, often the city or region, sometimes less accurate
• Whether the connection is likely a home line, mobile network, data center or VPN

It does not reveal your name, street address or browsing history on its own. Only your provider can link an IP address to a specific customer account, and they generally do that only under legal process.

Websites use IP addresses for practical things: showing local content, blocking spam and abuse, and spotting suspicious logins. If you want to hide your public IP from sites you visit, a reputable VPN replaces it with the VPN server's address.

The global pool of addresses is coordinated by IANA, which allocates blocks to regional registries, which in turn assign them to providers.

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