IPv4 Subnet Calculator

Free online IPv4 subnet calculator. Calculate network address, broadcast address, usable host range, and subnet mask for any IPv4 network.

IPv4 Subnet Calculator

IP Class

IP Address

CIDR Notation

Common IPv4 Subnets

192.168.1.0/24

Common home/small office network

Usable Hosts:

254

10.0.0.0/16

Large private network

Usable Hosts:

65,534

172.16.2.0/16

Medium enterprise network

Usable Hosts:

1,048,574

IPv4 Private Address Ranges

Class A

10.0.0.0 - 10.255.255.255

CIDR: /8

Class B

172.16.0.0 - 172.31.255.255

CIDR: /12

Class C

192.168.0.0 - 192.168.255.255

CIDR: /16

IPv4 Subnet Quick Reference

Common CIDR Notations

/24 = 255.255.255.0

254 usable hosts

/16 = 255.255.0.0

65,534 usable hosts

About this Calculator

Free online IPv4 subnet calculator. Calculate network address, broadcast address, usable host range, and subnet mask for any IPv4 network.

IPv4 Subnet Calculator