Subnet for IPv4 Network

Find network address, broadcast address and usual host-address range.

Your numbers

Network address

—

For /31 point-to-point, both addresses show as hosts; /32 get one address. E no determine routability or provider-reserved addresses.

Formula

Use B = 2^(32−p) and N = floor(A/B)×B. p na prefix length, A na di address as integer, B na address block size, and N na network address.

Find network address, broadcast address and usual host-address range.

Example wey show the calculation

Address for IPv4 network: 192.168.1.10
Number of bits for network prefix: 24

Network address: 192.168.1.0/24
Mask for the subnet: 255.255.255.0
Address wey come last: 192.168.1.255
How many addresses dey: 256
Usable hosts for the usual convention: 254
Host address wey come first: 192.168.1.1
Host address wey come last: 192.168.1.254

Where e fit work and limits

For /31 point-to-point, both addresses show as hosts; /32 get one address. E no determine routability or provider-reserved addresses.

We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.

Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.

Version of di formula: 8cc3d254dbd8 · Example don get check: 2026-10-30

Method