NetToolsmith

IPv4 / Subnetting

IPv4 Subnet Calculator

Enter an IPv4 address and prefix. Calculations stay in this browser.

Browser-only math

Example: 192.168.10.17/27

Answer

Subnet result

Entered IP
192.168.10.17
Network / CIDR
192.168.10.0/27
Subnet mask
255.255.255.224
Wildcard mask
0.0.0.31
Broadcast
192.168.10.31
First usable
192.168.10.1
Last usable
192.168.10.30
Total addresses
32
Usable addresses
30
Classification
Private-use address · RFC 1918
Interpret and inspect

Conventional subnet: the network and broadcast addresses are excluded from the usable range.

Binary entered IP: 11000000.10101000.00001010.00010001

Legacy class:Class C (legacy)

Network: 192.168.10.0/27
Mask: 255.255.255.224
Wildcard: 0.0.0.31
Usable: 192.168.10.1 - 192.168.10.30