How to convert IPv6 to IPv4 addresses?

In order to help your programming or testing tasks, FYIcenter.com has designed this online tool for you to convert any given IPv6 address to IPv4 addresses.

All you need to do is to enter an IPv6 address and click the "Convert" button. Converted IPv4 address will be displayed in the result area.

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IPv6 Address:

Converted result by FYIcenter.com - IPv4 Address:

Specified IPv6 Address: Valid ✔

IPv6 Address: 64:ff9b::192.168.100.101

This IPv6 Address Represents an NAT64 Prefixed IPv4 Address
    Dual Format: 64:ff9b:192.168.100.101
   IPv4 Address: 192.168.100.101

How IPv4 addresses are encapsulated in IPv6 addresses?

There several ways to encapsulate an IPv4 address in an IPv6 address:

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.

6. 6-to-4 Mapping of IPv4 Address - Identical to 6to4 Mapping of IPv4 Address, except that the IPv4 address is also mapped to the end of the IPv6 address. For example, IPv4 address, '192.168.100.101', should be converted as, '2002:c0a8:6465:0000:0000:0000:c0a8:6465', or " 2002:c0a8:6465::c0a8:6465" in compressed format.

 

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