Subnet Calculator

Calculate network subnets quickly and accurately

Subnet Calculator

Calculate network subnets quickly and accurately.

IP Version

IP Address

Prefix Length

IPv4 vs IPv6 Subnetting

IPv4 Subnetting

• 32-bit addresses
• CIDR notation: /0 to /32
• Has network and broadcast addresses
• Usable hosts = Total - 2
• Example: 192.168.1.0/24

IPv6 Subnetting

• 128-bit addresses
• CIDR notation: /0 to /128
• No broadcast addresses
• All addresses are usable
• Example: 2001:db8::/64