IPv6 Calculator
Calculate IPv6 subnets, expand/compress addresses, and identify address types for IPv6 network planning.
Results
NETWORK ADDRESS
2001:db8::
PREFIX
/64
ADDRESS TYPE
Global Unicast
FIRST ADDRESS
2001:db8::
LAST ADDRESS
2001:db8::ffff:ffff:ffff:ffff
SUBNET SIZE
2^64 addresses
EXPANDED FORM
2001:0db8:0000:0000:0000:0000:0000:0001
COMPRESSED FORM
2001:db8::1
IPv6 Address Format
Full:
2001:0db8:0000:0000:0000:8a2e:0370:7334
Compressed:
2001:db8::8a2e:370:7334
With prefix:
2001:db8::/32
Common IPv6 Types
Loopback: ::1
Unspecified: ::
Link-local: fe80::/10
Multicast: ff00::/8
Documentation: 2001:db8::/32
Prefix Lengths
/32Host route
/48Organization
/56Subnet
/64LAN
Compression Rules
• Remove leading zeros (0db8 → db8)
• Collapse longest zero sequence with ::
• Only one :: per address allowed
• Hexadecimal characters (0-9, a-f)