Use this Subnet Calculator to determine the properties of a network subnet. The query can be in a number of forms including network CIDR addresses and IP with network mask.
Valid Input 188.8.131.52 184.108.40.206-50 220.127.116.11/24 example.com
What is this Subnet Lookup?
When working with networks it is often required to quickly calculate the network boundaries of a subnet from a CIDR address or subnet with network mask. CIDR notation format is a way to express IP addresses and their associated routing prefix. It appends a slash character to the address and the decimal number of leading bits of the routing prefix, e.g., 192.168.2.0/24 for IPv4, and 2001:db8::/32 for IPv6.
Format of the Subnet to Lookup
Enter the subnet to lookup using one of the following formats.
192.168.1.0/24 192.168.1.0 255.255.255.0 10.10.0.0/16
IPv6 Subnet Lookup
Lookup IPv6 subnets using the same format. Simply enter the IPv6 address and include a CIDR notation.
Here are some examples:
API for the Subnet Calculator
In addition to the web form on this page there is another way to quickly lookup a subnet details. Output is simple and of content type text.