IP Subnet Calculator — Network & Host Range
Calculate network address, broadcast address, subnet mask, usable host range, and host counts from IPv4 CIDR input. The page also shows the binary reasoning so students can see how subnetting works, not just the answer.
Best for
CIDR practice
Input
Single or batch
Privacy
Local processing
Subnet workspace
Enter one IPv4 address with CIDR, or paste a batch list to check multiple subnets at once.
Batch subnet checker
One `IP/CIDR` entry per line. Useful for lab sheets and revision tasks.
Single subnet result
The calculator shows both the practical answer and the binary view behind it.
Frequently Asked Questions
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