IP Subnet Calculator¶

Use this interactive tool to quickly compute all key IPv4 subnet parameters.
First enter a valid IPv4 address, then specify either:

• a CIDR prefix length (e.g. 24)
• or a required number of hosts (e.g. 120)

Optionally, choose a desired subnet prefix (≥ your CIDR prefix) to split the network further.
All network details update instantly.