IP Address Info & Subnet Calculator
Look up IP address information and calculate subnet details, CIDR notation, and network ranges.
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Subnet Calculator
Frequently Asked Questions
- What is a subnet mask?
- A subnet mask (e.g. 255.255.255.0) defines which part of an IP address is the network and which is the host.
- What is CIDR notation?
- CIDR notation (e.g. 192.168.1.0/24) is a compact way to represent an IP address and its associated subnet mask.