Welcome to the new 2026 Gentlent experience. Some features are still being added, but feel free to explore and check back often for updates!

IP subnet calculator

Calculate IPv4 and IPv6 networks, address ranges and subnet splits from an address and prefix length.

IP address

IPv4 or IPv6 address, optionally with a prefix length — e.g. 192.168.10.130/26 or 2001:db8::/48.

Number of subnets

Optional. Enter at least 2 subnets.

Subnet prefix length

Optional. Allowed range: 0–32