This page will convert an IPv4 address into it's default 6-to-4
equivalent, or vice versa. For 6-to-4, the IPv6 address is
formed by using the IPv4 address and the following scheme:IPv4:
a.b.c.d translates to IPv6 2002:ab:cd::ab:cd For IPv6, the
octects are represented as a hexadecimal number, while IPv4 uses
decimal. The 2002:/16 prefix is reserved for 6-to-4 addressing.
This page will also decode Teredo IPv6 addresses to extract the
public IPv4 address of the host and the server. More special
features and prefixes are being added. IP Entry Form Enter an
IPv4 or IPv6 address: This is experimental. please contact us
about errors and improvements. How to Translate Teredo IPv6
addresses - First 32 bits: 2001:0000 (fixed Teredo prefix) -
Second 32 bits: IPv4 address of the server - 16 Bits of Flags
(determining what kind of NAT is in use) - 16 Bits for UDP port
used (obfuscated) - last 32 Bits: public IPv4 address of the
client see RFC 4380 for details