Subnet Calculator

Calculate subnet masks, network addresses, broadcast addresses and more

IP Address:

Subnet Mask:

Or Enter CIDR:

CIDR: /27

Network Address:

192.168.1.0

Broadcast Address:

192.168.1.31

First Usable IP:

192.168.1.1

Last Usable IP:

192.168.1.30

Usable Hosts:

Total Hosts:

Subnet Mask:

255.255.255.224

Wildcard Mask:

0.0.0.31

Router

SW1

Network: 192.168.1.0/27

SW2

Next Subnet

Host Range:

192.168.1.1 - 192.168.1.30

Network Address: The first address in the subnet. Cannot be assigned to hosts.
Broadcast Address: The last address in the subnet. Used for broadcast messages.
Usable Hosts: Addresses that can be assigned to devices (excluding network and broadcast).
CIDR Notation: The number after the slash (/) represents the subnet mask bits.
Wildcard Mask: Inverse of subnet mask, used in access control lists.