Manual Subnet Calculator

Enter your virtual network to subnet below:

Select columns to display:
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Want an automatic version with 3 different options to split? Go here: Automatic Subnet Calculator

Notes:

Network Bits = Derived from CIDR notation /n
Host Bits = Total bits (32) - network bits
Number of Hosts = 2Host bits - 2
Borrowed bits = New Subnet's network bits - Original vnet's network bits
Number of Subnets = 2Borrowed bits

Subnet Reference table for different network classes

Class A

[0.0.0.0 - 127.255.255.255]
Network Bits: 8, Host Bits: 24
Network Bits Subnets Hosts (per subnet) Subnet Mask

Class B

[128.0.0.0 - 191.255.255.255]
Network Bits: 16, Host Bits: 16
Network Bits Subnets Hosts (per subnet) Subnet Mask

Class C

[192.0.0.0 - 223.255.255.255]
Network Bits: 24, Host Bits: 8
Network Bits Subnets Hosts (per subnet) Subnet Mask