IP Address & Subnet Calculator

IPv4 Subnet Calculator

Network Class

Any A B C

Subnet

Format: 255.255.255.0 /24

IP Address

IP (validated)

Subnet mask

Wildcard mask

Prefix length

Network address

Broadcast address

First usable

Last usable

Total addresses

Usable hosts

Note: /31 subnets are point-to-point (usable hosts = 2); /32 represents a single host.

IPv6 Subnet Calculator

Prefix Length

IP Address

IP (expanded)

Prefix length

Network address

Range start

Range end

Addresses in subnet

IPv6 is classless. Results show the canonical expanded form and the address range for the selected prefix.