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IPv4 / CIDR Subnet Calculator

100% Client-Side Private — Zero Server Uploads

Calculate network address, broadcast address, subnet mask, wildcard mask, and usable IP range from CIDR notation. 100% Client-Side.

Quick Subnet Presets:
CIDR Notation
192.168.1.1/24
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Usable Host Range
192.168.1.1 - 192.168.1.254
Total Usable Hosts
254
IP Class & Type
Class C (Private)
Binary Netmask
11111111.11111111.11111111.00000000

How do I use IPv4 / CIDR Subnet Calculator?

1

Type an IP address with CIDR prefix (e.g. 192.168.1.0/24 or 10.0.0.0/16).

2

View network matrix including Subnet Mask, Network/Broadcast IP, and Usable host range.

3

Click copy icons to extract individual values for router/VPC configuration.

What features does IPv4 / CIDR Subnet Calculator offer?

Bitwise fast IPv4 calculation

Subnet mask & Wildcard mask computation

Total and usable host count calculation

Frequently Asked Questions about IPv4 / CIDR Subnet Calculator

Why are usable hosts 2 less than total hosts?

In standard IPv4 subnets, the Network Address (first IP) and Broadcast Address (last IP) are reserved and cannot be assigned to hosts.