Subnet Calculator
DeveloperCalculate IP subnet details including network address, broadcast address, subnet mask, and usable host range.
| Value | Address | Binary Mask |
|---|---|---|
| Network Address | ||
| Broadcast Address | ||
| Subnet Mask | ||
| Wildcard Mask | ||
| CIDR Notation | ||
| Usable Hosts | ||
| Usable IP Range | ||
| First Usable IP | ||
| Last Usable IP | ||
| IP Class | ||
| Type | ||
▶ About Subnetting
CIDR (Classless Inter-Domain Routing) is an IP address allocation method using /N to denote the network prefix length. Subnetting divides a single IP network into smaller subnets for efficient address utilization.
Usable Hosts = 2^(32 - prefix) - 2
Network Address = IP & Mask
Broadcast Address = Network + (2^(32 - prefix) - 1)
Example:
IP: 192.168.1.0/24 → 256 addresses, 254 usable hosts
IP: 192.168.1.0/24 → 256 addresses, 254 usable hosts
Note: The first address is the network address and the last is the broadcast address — neither can be assigned to hosts.