🧮 IP / Subnet Calculator

IPv4 & IPv6 subnet math, flexible CIDR input, subnet splitting.

Address / network

One field, any format: 10.0.0.0/24, 10.0.0.0 /24, 10.0.0.0 255.255.255.0. No mask at all? Assumes /24 (IPv4) or /64 (IPv6).