IP Subnet & CIDR Calculator
Calculate network range, broadcast IP, usable hosts, subnet mask, wildcard mask, and binary breakdown from any CIDR notation. · Updated
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FAQ
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) specifies an IP address followed by a slash and the number of leading 1-bits in the routing mask (e.g. `/24` represents 255.255.255.0).
Why are 2 addresses subtracted from the total hosts in a subnet?
In standard subnets, the very first address is reserved for the Network ID, and the last address is reserved for the Subnet Broadcast.
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