Enter IPv6 Address

Enter an IPv6 address in the "yellow" field above and click the "Calculate" button.
The address will be classified and referenced to RFC.
Script matches against over 250 reserved prefixes and masks.
Prefix (subnetmask) is calculated and how many /64 subnets.

Address formats

xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/nn
8 chunks of 4 hex / prefix bits (0-128)

xxxx:x::xx
truncated formats OK

xxxx:oo.oo.oo.oo::x
embeded IPv4 addresses OK

Example Addresses

::1
fe80::02d0:c1ff:fe5c:0010/10
3ffe:80f0:1:1001::1/64
2002:192.88.99.1::1/64
2001::1
2002:c0a8:1122::5efe:0a01:0101/48
ff02::9
ff02::1:ff11:2233

Notes/Todo

  • You can enter 2 embedded IPv4 addresses (4 octet format)
  • ff0x:: anyscope multicast addresses are listed as ff00::
  • ::/96 v4compat detected even though v4 is 0.0.0.0