IPv6 notation converter
IPv6 notation converter lets you convert IPv6 canonical, expanded, hexadecimal, and 128-bit integer forms in your browser.
IPv6/CIDR calculator
IPv6/CIDR calculator lets you calculate IPv6 network ranges and exact 128-bit address totals in your browser.
IPv6/CIDR calculator
⌂ Inputs and results stay in this browser and are not automatically stored or sent.
Waiting for input
Input and conditions
Calculations use your input only; no network queries or configuration changes.
Output
Waiting for input
Complete text result
How to use
Enter an IPv6 address and prefix length to inspect the network start, end, and exact address count.
There is no need to enumerate every address in a huge range. Do not apply IPv4 broadcast or subtract-two host conventions to IPv6; interpret the result as an address range.
Examples
2001:db8:1234::1/48Principles and limits
Each input is limited to 1,048,576 bytes, output to 33,554,432 bytes, and processing to 5,000 ms. Input is never silently truncated.
Guides
Related tools
IP and CIDR comparison
IP and CIDR comparison lets you calculate CIDR containment, overlap, intersection, and directional differences in your browser.