Subnet Calculator
Calculate IPv4 subnets instantly. Get network addresses, broadcast, usable hosts, and subnet masks.
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FAQ
What is a Subnet Calculator?
A subnet calculator helps network administrators divide an IP network into subnetworks by calculating network addresses, broadcast addresses, usable host ranges, and subnet masks for any given CIDR notation.
How does subnet calculation work?
Subnetting works by borrowing bits from the host portion of an IP address to create more networks. The calculator determines the new subnet mask, network addresses, and usable host ranges.
What is CIDR notation?
CIDR notation represents an IP address and its routing prefix in the format: IP_address/prefix_length (e.g., 192.168.1.0/24). The number after the slash indicates the number of network bits.
Is this tool accurate for professional use?
Yes, the subnet calculator uses industry-standard algorithms and follows RFC specifications for IPv4 subnetting. Results are accurate for network planning.
Can I calculate multiple subnets?
Yes, you can specify how many equal-sized subnets you need, and the calculator will generate all subnet details including network addresses and usable host ranges.
What is the maximum number of subnets?
You can calculate up to 256 subnets at once, though practical limits depend on the original CIDR prefix.