Developer tool

Subnet Calculator

Split an IPv4 network into smaller subnets and inspect their address ranges.

Runs in your browser

Subnet CalculatorIPv4

IPv4 addressCIDR prefixbitsNew subnet prefixbits

Network: 192.168.1.0/24
Subnet mask: 255.255.255.0
Broadcast: 192.168.1.255
Total addresses: 256
Usable hosts: 254
New subnets: 8

192.168.1.0/27   192.168.1.0 – 192.168.1.31
192.168.1.32/27   192.168.1.32 – 192.168.1.63
192.168.1.64/27   192.168.1.64 – 192.168.1.95
192.168.1.96/27   192.168.1.96 – 192.168.1.127
192.168.1.128/27   192.168.1.128 – 192.168.1.159
192.168.1.160/27   192.168.1.160 – 192.168.1.191
192.168.1.192/27   192.168.1.192 – 192.168.1.223
192.168.1.224/27   192.168.1.224 – 192.168.1.255

How to use this subnet calculator

Enter the IPv4 address and CIDR prefix, then confirm that the prefix matches the network you intend to inspect.
Review the calculated totals, units, and assumptions. Check syntax, escaping, and edge cases against the source before using the result in a live project.
Change one input at a time to compare another case, then copy or save the result you plan to use.

About this subnet calculator

Use the Subnet Calculator to split an IPv4 network into smaller subnets and inspect their address ranges. Change the inputs to compare another result.

You can also use it to compare results after changing one input.

Example

Enter 192.168.1.0/24 in the Subnet Calculator to inspect the mask, network range, broadcast address, and usable hosts.

Common uses

→ split an IPv4 network into smaller subnets and inspect their address ranges
→ compare results after changing one input
→ save an estimate for planning or comparison