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 8.8.8.8 1.1.1.1-50 1.1.1.1/24 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:

2a01:7e00::f03c:91ff:fe70:d437/64

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.

https://api.hackertarget.com/subnetcalc/?q=192.168.1.0/24
The API is simple to use and aims to be a quick reference tool. Like all our IP Tools there is a limit of 50 queries per day or you can Remove limits with a Full Membership.

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