IPv6 Calculator
Calculate IPv6 network ranges, compressed and expanded addresses, prefix details, subnet sizes, and reverse DNS notation
IPv6 Address & Prefix
Analyze 128-bit IPv6 networks with BigInt precision.
Network prefix
2001:db8::/64
Address type
Documentation
Host bits
64
Total addresses
18,446,744,073,709,551,616
Subnets at /80
65,536
Compressed
2001:db8::1
Expanded
2001:0db8:0000:0000:0000:0000:0000:0001
First address
2001:db8::
Last address
2001:db8::ffff:ffff:ffff:ffff
Hex groups
Group 1
2001
Group 2
0db8
Group 3
0000
Group 4
0000
Group 5
0000
Group 6
0000
Group 7
0000
Group 8
0001
Reverse DNS nibble notation
CIDR
/64
Prefix range
2001:db8:: → 2001:db8::ffff:ffff:ffff:ffff
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