How can I get a list of all IP addresses?

What IP ranges are public?

I am trying to work out how my ip address is obtained.

Does anyone know? I just assumed its my broadband modem which then connects to the ISP. If anyone knows a method of getting it without using their help systems, I would be happy to hear of them. Thanks. It depends on the ISP - usually you enter your ISP's web address into your browser (which gives your IP address), but some ISPs give you the IP address directly, or the ISP's proxy web address. Your IP address is the IP address of your gateway. Depending on your Internet connection this may be your wireless router. Sometimes the wireless router is just a computer connected to the Internet over a wireless network and the public IP address of your wireless router is what the Internet assigns it. Other times your router or modem is a gateway between the LAN and the Internet. If it's the former, your public IP address is what the router assigns it. If it's the latter, the router's IP address is the public IP address assigned to it by your ISP.

You'll get a public IP address when your router is giving the Internet Service Provider (ISP) the external-facing interface for the IP range assigned to the Internet. Your gateway / router will give the external IP address, but most likely it will also have a NAT that will allow inbound connections, which will further reduce the "public IP" address since most people use dynamic DNS. Example public IP addresses for Google Apps: Google Apps for Small Business: 8.8 Google Apps for Enterprises: 35.193.194.37
The ISP will also assign them to you, and if your broadband modem supports IP pooling then it could have its own assigned external address as well.

What is the range of all IP addresses?

For example, I've only seen 10.

0/8 or 192.168.0/16 (sometimes with subnet mask for the CIDR) in RFCs
Is it safe to assume that an IP address ranges from 0-255? What are the legal address ranges for private and public IP addresses? What is considered valid and invalid as a domain name? Is it safe to say all legal domain names must have a domain, a local part and a TLD? Are there any reserved IP ranges which will never be allocated for any purpose? Any other specific use cases of IPv4 addresses? An IPv4 network cannot exist without a valid IPv4 address. It's also important to realize that an IPv4 address could be reused in the future for entirely different purposes; it's not simply that you can't reuse these same blocks today for new purposes, but that you could potentially give some future purpose to blocks that were used for old purposes. The concept of allocating "legacy" addresses for things like DHCP reservations does not mean that there is now additional permanent address space to allocate to things like internal communications; a block is only being used for a particular purpose when it's the only thing that you can use to that purpose. (This is part of why the maximum size of a block is technically not infinite. There are rules governing how to do resource allocation when it's clear that a block is going to be fully occupied for an arbitrary period of time.)
If we are talking about the block structure rather than specific addresses, then your questions about the first /8 (ie 192.168) and last /8 (ie 10.0/8) should be answered with "yes". Note that 10.0/8 covers less than the entire internet (and that 10.0/8 is a Class A address which would therefore require a network ID prefix of 1). I believe that 10.0/24 was reserved for private use but that all networks should eventually be assigned this range as it doesn't conflict with any existing allocations and would give the impression that someone forgot to include it in their IP plan.

Note that there is no maximum or minimum number of possible /24 blocks required by the standard; the address itself determines its size in bits.

What is the public IP address?

It will be used to reach the host from a client.

Step 1 - Install Ip Address as a Service. Open up an SSH console and login as root: ssh root@. To get an IP address for your EC2 instance, type this command: ec2-describe-instances --filter Name=tag:Name=instance-id 3.4 You can also find this by clicking on your Public DNS Name from EC2 Dashboard. Step 2 - Create a VPC. First, log in to your EC2 Dashboard and select Launch Instance. Click Next and then Select the VPC you wish to create an instance in: Give it a name such as myVPC: and then continue. Step 3 - Create Instance. Type the name of the instance that you created in Step 2. For the Public DNS Name, leave it blank, it's already set for you: You can also leave the security group empty, just as we did in Step 1: Step 4 - Associate Public IP. In your network, open up a terminal and run this command: sudo ip address add /32 dev eth0. You should see a message like this when the address is successfully added: If you have more than one subnet, you can use the ipaddress add / syntax instead. To check if your instance has an IP address, type this in your SSH console: route -n. You should see something like this: Step 5 - Connect To Your Instance. Now that you have an IP address, you can easily connect to your instance.