IPv4 Subnet
Find a network, broadcast address and conventional host range.
Your numbers
Network
For /31 point-to-point both addresses are shown as hosts; /32 has one address. Does not determine routability or provider-reserved addresses.
Scenario comparison
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Formula
Use B = 2^(32−p) and N = floor(A/B)×B. p is the prefix length, A is the integer address, B is the address block size, and N is the network address.
Find a network, broadcast address and conventional host range.
Worked example
- IPv4 address
- 192.168.1.10
- Prefix length
- 24
- Network
- 192.168.1.0/24
- Subnet mask
- 255.255.255.0
- Last address
- 192.168.1.255
- Address count
- 256
- Conventional usable hosts
- 254
- First host
- 192.168.1.1
- Last host
- 192.168.1.254
Scope and limitations
For /31 point-to-point both addresses are shown as hosts; /32 has one address. Does not determine routability or provider-reserved addresses.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
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Formula version: 8cc3d254dbd8 · Example checked: