Subnet Calculator

Type an address with a prefix, or give it a dotted mask. The network, the host range and the bit split follow.

Address

Mask or prefix

Prefix length/24

Network address

Broadcast address

First usable host

Last usable host

Subnet mask

Wildcard mask

Bits, split at the prefix

Address

Mask

Split this network

A /31 has no network or broadcast address. RFC 3021 hands both of its addresses to the two ends of a point-to-point link, so it is listed here as two usable hosts. A /32 is one address on its own.