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IPv4 Subnet Calculator
Calculate subnet masks, network addresses, broadcast addresses and usable hosts for IPv4 networks.
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About this Tool
Use this free IPv4 subnet calculator to determine subnet masks, CIDR ranges, network addresses, broadcast addresses and available host counts for IPv4 networks.
Examples
- 192.168.1.0/24
- 10.0.0.0/16
- 172.16.10.0/27
Frequently Asked Questions
What is CIDR notation?
CIDR notation represents an IP address and subnet mask using a suffix such as /24.
What is a broadcast address?
A broadcast address is used to send packets to all hosts within a subnet.
Can host ranges be calculated?
Yes. The calculator can determine the first and last usable IP addresses.