Extract the IPv4 address embedded in IPv6 addresses: IPv4-mapped, NAT64, 6to4, Teredo and IPv4-compatible formats. Converts a list of addresses at once.
Extract the IPv4 address embedded in a mapped, compatible, 6to4 or NAT64 IPv6 address.
How to use IPv6 to IPv4 Converter
Paste one IPv6 address per line.
Each line shows the embedded IPv4 address and the format it was found in.
Addresses without an embedded IPv4 address are labelled with their address type instead.
Worked example
A web server log entry of ::ffff:203.0.113.5 is the IPv4 client 203.0.113.5. The Teredo address 2001:0:4136:e378:8000:63bf:3fff:fdd2 reveals the client 192.0.2.45 on port 40000.
Can every IPv6 address be converted?
No. Most IPv6 addresses are native and contain no IPv4 address; only the transition formats embed one.
What is Teredo?
An old tunnelling technology that carried IPv6 over IPv4 through NAT, encoding the server and an obfuscated client address and port.
Put this guide into practice
IPv6 to IPv4 Converter — Extract the IPv4 address embedded in a mapped, compatible, 6to4 or NAT64 IPv6 address.