Enter an IPv4 address and CIDR prefix to calculate the network address, broadcast address, usable host range, and subnet mask.
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Pv4 Subnet Calculation Tool
| IP Address | 192.168.1.10 |
|---|---|
| CIDR Notation | 192.168.1.0/24 |
| Subnet Mask | 255.255.255.0 |
| Wildcard Mask | 0.0.0.255 |
| Network Address | 192.168.1.0 |
| Broadcast Address | 192.168.1.255 |
| First Usable Host | 192.168.1.1 |
| Last Usable Host | 192.168.1.254 |
| Total Addresses | 256 |
| Usable Hosts | 254 |
| Prefix Length | /24 |
IPv4 Address
CIDR Prefix
About IP Subnetting
An IPv4 address is a 32-bit number usually written as four decimal octets. A subnet splits a network into smaller blocks using a CIDR prefix, which specifies how many leading bits identify the network. For example, /24 reserves 24 bits for the network and leaves 8 bits for hosts.
The network address is the first address in a block and the broadcast address is the last. Usable host addresses fall between them. A /31 block is used for point-to-point links and provides two usable addresses, while a /32 represents a single host with no host range.