Recognised as IPv6 prefix
fc00::/7
- IPv6
- Unique local
- /7
fc00::/7 is an IPv6 prefix in the unique local range: private addressing, the rough equivalent of RFC 1918. It covers 2^121 addresses, from fc00:: to fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff.
Representations
Compressed (RFC 5952)fc00::
Fully expandedfc00:0000:0000:0000:0000:0000:0000:0000
In a URL[fc00::]brackets separate the address from the port
Integer334965454937798799971759379190646833152
Hexadecimal0xfc000000000000000000000000000000
Reverse DNS0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.f.ip6.arpaeach nibble becomes a label, least significant first
What kind of address
RangeUnique localprivate addressing, the rough equivalent of RFC 1918
Routable on the internetNo
Address familyIPv6128 bits, against 32 for IPv4
Groupsfc00, 0, 0, 0, 0, 0, 0, 0
Zero groups7runs of two or more are what "::" replaces
Prefix arithmetic
Prefix length/7
Network addressfc00::
Last addressfdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
Addresses in the block2^121more than the whole IPv4 internet, many times over
/64 subnets available2^57a /64 is the standard size for a single LAN
Host bits121
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