There are 256 such blocks, called 0/8 to 255/8. Because of the huge size of IPv6, we do not care about the number of hosts in a network. Originally, … Continue reading IPv4 and IPv6 Address Spaces This allows for a maximum of 4,294,967,296 (2 32) unique addresses.Addresses in IPv6 are 128-bits, which allows for 3.4 x 10 38 (2 128) unique addresses..

Remember, the size of IPv6 can be huge. If we reduce t he IPv6 address size from 128-bit to 64-bit, this size can accommodate 18,446,744,069,599,100,000 IPv6 addresses and e xhibition date will be at …

An IP address (internet protocol address) is a numerical representation that uniquely identifies a specific interface on the network.Addresses in IPv4 are 32-bits long. IP addresses are usually written and displayed in human-readable notations, such as 172.16.254.1 in IPv4, and 2001:db8:0:1234:0:567:8:1 in IPv6. Also unlike IPv4, the IPv6 address is represented in hexadecimal notation, separate by colons. Both IPv4 and IPv6 addresses come from finite pools of numbers. The IPv6 address size is 128 bits. Because of this, only the first 999 subnets are displayed. Use the above calculator to plan your IPv6 networks. An example of an IPv6 address would be: 1254:1532:26B1:CC14:0123:1111:2222:3333 Each “grouping” (from here on called fields) of hexadecimal digits is 16 This calculator can crash your browser if you attempt to have it calculate billions of subnets!

This increased size provides for a broader range of addressing hierarchies and a much larger number of addressable nodes.

The size and format of the IPv6 address expand addressing capability.

When discussing the IPv4 address space, we talk about “/8” (pronounced “slash 8”) blocks. IPv4 Address Space IPv4 addresses are 32 bits long.

Each /8 block has 224 (about 16.7 million) addresses. For IPv4, this pool is 32-bits (2 32) in size and contains 4,294,967,296 IPv4 addresses.

In IPv6, the network prefix performs a similar function as the subnet mask in IPv4, with the prefix length representing the number of bits in the address. IP version 6 (IPv6) increases the size of the IP address from the 32 bits found in IPv4 to 128 bits.

This means there are a total of 232 (about 4.3 billion) possible addresses. The two most common versions of IP in use today are Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6). The preferred IPv6 address representation is: x:x:x:x:x:x:x:x, where each x is the hexadecimal values of the eight 16-bit pieces of the address. The IPv6 Address The IPv6 address is 128 bits, as opposed to the 32-bit IPv4 address. IPv6 addresses range from 0000:0000:0000:0000:0000:0000:0000:0000 to ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff.