Networking & Web
IPv4 Subnet Calculator
Enter an address in CIDR notation to get the full subnet breakdown — network, broadcast, host range, and binary representation.
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How it works
Three steps, no setup
1
Enter CIDR notation
For example 192.168.1.0/24.
2
Read the subnet breakdown
Network address, broadcast, usable host range, and total host count.
3
Check the binary view
See the subnet mask and wildcard mask spelled out in binary.
Common questions
Frequently asked questions
What is a wildcard mask used for?
It is the inverse of the subnet mask and is commonly required when configuring access control lists on network equipment.
How many usable hosts does a /24 have?
A /24 network provides 256 total addresses, with 254 usable for hosts once the network and broadcast addresses are excluded.
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