How to valid IPv6 addresses?

In order to help your programming or testing tasks, FYIcenter.com has designed this online tool for you to validate any given IPv6 address.

All you need to do is to enter an IPv6 address and click the "Validate" button. Validation result will be displayed in the result area.

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IPv6 Address:

Validation result by FYIcenter.com - IP Address:

Specified IPv6 Address: Valid ✔

IPv6 Address: 2001:db8:3333:4444:5555:6666:1.2.3.4

Different Formats of the IPv6 Address
     Expanded: 2001:0db8:3333:4444:5555:6666:0102:0304
    Condensed: 2001:db8:3333:4444:5555:6666:102:304
   Compressed: 2001:db8:3333:4444:5555:6666:102:304
  Dual Format: 2001:db8:3333:4444:5555:6666:1.2.3.4

What is an IPv6 address?

An IPv6 address is an identification assigned to a computer host on the Internet. IPv6 is the version 6 of IP address standard. It uses 128 bits or 16 bytes to represent IP addresses.

A 16-byte IPv6 address is normally represented hexadecimal digits and divided into 8 groups separated by colons (:). For example, " 2001:0db8:0000:0000:0000:ff00:0042:8329" is an IPv6 address.

For convenience, an IPv6 address may be condensed or compressed to reduce its length using these rules.

• Condensed Format: - One or more leading zeroes from any groups of hexadecimal digits are removed; this is usually done to either all or none of the leading zeroes. For example, the above IPv6 address can be abbreviated as: " 2001:db8:0:0:0:ff00:42:8329".
• Compressed Format - Consecutive sections of zeroes are replaced with a double colon (::). The double colon may only be used once in an address, as multiple use would render the address indeterminate. For example, the above IPv6 address can be abbreviated as: " 2001:db8::ff00:42:8329".

An IPv6 address can also include an IPv4 address component in a Dual format of "x.x.x.x.x.x:d.d.d.d". For example: " 2001:db8:3333:4444:5555:6666:1.2.3.4".

There are several standard ways to map IPv4 addresses to IPv6 addresses:

1. Dual Format of IPv4 Mapped Address - Prefix the IPv4 address with '0000:0000:0000:0000:0000:ffff:' to form the IPv6 address in the dual format. For example, IPv4 address, '192.168.100.101', should be converted as, '0000:0000:0000:0000:0000:ffff:192.168.100.101', or " ::ffff:192.168.100.101" in compressed format.

2. Hex Format of IPv4 Mapped Address - Convert the IPv4 address to 2 hex segments and prefix it with '0000:0000:0000:0000:0000:ffff:' to form the IPv6 address. For example, IPv4 address, '192.168.100.101', should be converted as, '0000:0000:0000:0000:0000:ffff:c0a8:6465', or " ::ffff:c0a8:6465" in compressed format.

3. Dual Format of NAT64 Prefix Address - Prefix the IPv4 address with '0064:ff9b:0000:0000:0000:0000:' to form the IPv6 address in the dual format. For example, IPv4 address, '192.168.100.101', should be converted as, '0064:ff9b:0000:0000:0000:0000:192.168.100.101', or " 64:ff9b::192.168.100.101" in compressed format.

4. Hex Format of NAT64 Prefix Address - Convert the IPv4 address to 2 hex segments and prefix it with '0000:0000:0000:0000:0000:ffff:' to form the IPv6 address. For example, IPv4 address, '192.168.100.101', should be converted as, '0064:ff9b:0000:0000:0000:0000:c0a8:6465', or " 64:ff9b::c0a8:6465" in compressed format.

5. 6to4 Mapping of IPv4 Address - Convert the IPv4 address 2 hex segments, prefix it with '2002', and pad it with 5 segments of "0000. For example, IPv4 address, '192.168.100.101', should be converted as, '2002:c0a8:6465:0000:0000:0000:0000:0000', or " 2002:c0a8:6465::" in compressed format.

 

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