Convert an IP address range to CIDR notation: enter a start and end address to get the exact IPv4 or IPv6 CIDR blocks. Runs in your browser, capped at 256 blocks.
Represent an inclusive IPv4 or IPv6 address range as exact CIDR blocks.
Both addresses must use the same family. Results are local and capped at 256 ranges.
The generated blocks cover the inclusive range exactly. This does not check routes, reservations or address ownership. To list the first and last address of a CIDR block, use the CIDR to IP range calculator.
Convert an IP address range to CIDR notation: enter a start and end address to get the exact IPv4 or IPv6 CIDR blocks. Runs in your browser, capped at 256 blocks.
Review the limits and privacy notes shown with the tool. Important configuration or security decisions should be checked against authoritative systems and your organization’s approved procedures.
Browse the complete free IT tools directoryNothing was sent. Email us instead.