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.
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