Private IP Address vs Public IP Address


What is a Private IP Address?

A private IP address is an IP address that’s reserved for internal use behind a router or other Network Address Translation (NAT) device, apart from the public. Private IP addresses are in contrast to public IP addresses, which are public and can not be used within a home or business network.

Which IP Addresses Are Private?

The Internet Assigned Numbers Authority (IANA) reserves the following IP address blocks for use as private IP addresses:

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What is a public IP Address?

A public IP address is an IP address that your home or business router receives from your ISP. Public IP addresses are required for any publicly accessible network hardware such as a home router and the servers that host websites.

What Does a Public IP Address Do?

Public IP addresses differentiate the devices that are plugged into the public internet. Each device that accesses the internet uses a unique IP address. A public IP address is sometimes called an Internet IP.

Private vs Public IP Addresses

A private IP address is, in most ways, the same as a public IP address. It’s a unique identifier for all the devices behind a router or other device that serves IP addresses.

Because these private addresses are restrained from reaching the internet, you need an address that can reach the rest of the world, which is why a public IP address is needed.

Both private and public addresses are used for communication, but the range of that communication is limited based on the address that’s used.

When you open a website from your computer, the request is sent from the computer to the router as a private IP address, after which the router requests the website from your ISP using the public IP address assigned to your network. Once the request has been made, the operations are reversed — the ISP sends the address of the website to your router, which forwards the address to the computer that asked for it.

How to Find Your Public IP Address

You don’t need to know your public IP address most of the time, but there are situations where having it is important or even necessary, for example, to access your network, or a computer within it, when you’re away from home or your business.

You can use this link: to check your public IP Address precisely.