IPv4 address converter

    Convert an IPv4 address to decimal, hex, binary and IPv6 forms.

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    About the ipv4 address converter

    Shows an IPv4 address in every representation you are likely to meet: dotted decimal, 32-bit integer, hexadecimal, octal, binary, IPv6-mapped and 6to4 forms, plus the reverse DNS name and the address scope.

    Frequently asked questions

    Why would an address appear as a single integer?

    Databases and log formats often store the 32-bit value directly because it is compact and sorts and range-queries efficiently. It is the same address, written in one piece.

    What is the ::ffff: form for?

    IPv4-mapped IPv6. A dual-stack socket reports IPv4 clients in that notation, which is why IPv4 addresses turn up with an IPv6 prefix in server logs.

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