Why -2 hosts?
The first address is the Network Address and the last is the Broadcast Address. Neither can be assigned to a specific host.
Calculator
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Analysis
Interpretation of the current calculator output
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How to Use
Step-by-step instructions
- 1Enter the IP address.
- 2Enter the CIDR suffix (e.g., 24 for /24).
- 3The calculator will display the netmask and host count.
Subnet Calculation
Calculates the number of available IP addresses in a subnet based on the prefix length (CIDR).
Hosts = 2^(32 - CIDR) - 2Variables:
CIDRNetwork prefix length (0-32)Example
/24 Network
Inputs:
IP:192.168.1.0
CIDR:24
Steps:
- 1.Host Bits = 32 - 24 = 8
- 2.Total Hosts = 2^8 = 256
- 3.Usable = 256 - 2 = 254
Result:
254 Hosts