How can i find ip addresses

An IP address uniquely identifies a device on a network. An IP address is always a set of four numbers like that. Each number can range from 0 to So, the full IP addressing range goes from 0. The reason each number can only reach up to is that each of the numbers is really an eight digit binary number sometimes called an octet.

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In an octet, the number zero would be , while the number would be , the maximum number the octet can reach. That IP address we mentioned before Computers work with the binary format, but we humans find it much easier to work with the decimal format. Still, knowing that the addresses are actually binary numbers will help us understand why some things surrounding IP addresses work the way they do.

On your home network, then, you might see several devices with IP address like All of these are unique devices with host IDs 1, 2, 30, and 34 in this case on the same network with the network ID Take an address like Paradise Street.

The street name is like the network ID, and the house number is like the host ID. Within a city, no two streets will be named the same, just like no two network IDs on the same network will be named the same. On a particular street, every house number is unique, just like all host iDs within a particular network ID are unique. That number is called the subnet mask.

The position of the changes from to 0 indicate the division between the network and host ID. Things get more complicated than this on bigger networks. People often use custom subnet masks where the position of the break between zeros and ones shifts within an octet to create multiple subnets on the same network. The router sits between the computers and devices on your network and the more public-facing devices on the internet, passing or routing traffic back and forth.

Say you fire up your browser and head to www. The server sends the right information back to your router, which then routes the information back to the device that requested it, and you see our site pop up in your browser. Typically, routers are configured by default to have their private IP address their address on the local network as the first host ID. So, for example, on a home network that uses Of course, like most things, you can configure that to be something different if you want. We humans work much better with names than numerical addresses.

A word about accuracy:

Typing www. DNS works kind of like a phone book, looking up human-readable things like website names, and converting those to IP addresses.

Your devices need to know the addresses of DNS servers to which to send their queries. On a typical small or home network, the DNS server IP addresses are often the same as the default gateway address.

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4. How to Find Your IP Address.
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Devices send their DNS queries to your router, which then forwards the requests on to whatever DNS servers the router is configured to use. You also may have noticed while browsing through settings a different type of IP address, called an IPv6 address. They use the 32 binary bits we talked about in four octets to provide a total of 4.



At the dawn of IPv4 addressing, the Internet was not the large commercial sensation it is today, and most networks were private and closed off from other networks around the world. When the Internet exploded, having only 32 bits to identify a unique Internet address caused people to panic that we'd run out of IP addresses. Under IPv4, there are possible combinations, which offers just under 4. IPv6 raised that to a panic-relieving possible addresses.

Later, we'll take a closer look at how to understand your computer's IPv4 or IPv6 addresses. How does your computer get its IP address? An IP address can be either dynamic or static.



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A static address is one that you configure yourself by editing your computer's network settings. Dynamic addresses are the most common.

How do I set a static IP address in Windows?

Dynamic IP addresses are issued using a leasing system, meaning that the IP address is only active for a limited time. If the lease expires, the computer will automatically request a new lease. Sometimes, this means the computer will get a new IP address, too, especially if the computer was unplugged from the network between leases. This process is usually transparent to the user unless the computer warns about an IP address conflict on the network two computers with the same IP address.

An address conflict is rare, and today's technology typically fixes the problem automatically. Next, let's take a closer look at the important parts of an IP address and the special roles of certain addresses.