IP Subnet Calculator

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A CIDR to IPv4 Converter Tool

CIDR (Classless Inter-Domain Routing) Mapping is a method used to capture a CIDR range and provide information about the IP addresses available within that range. With CIDR, a single IP address can be used to create multiple unique IP addresses. The CIDR IP address looks like a normal IP address with the addition of an IP network prefix that can be identified by a forward slash and number (i.e. "/24") at the end of the IP address (i.e. 192.168.1.1/26 or 172.16.100.1/22). This tool is intended to help you perform network tasks, like figuring out the subnet mask, calculating total host count, or identifying what the first and last IP is within a specific CIDR range.

IP Subnet Calculator

Enter a CIDR notation IP address (e.g. 192.168.1.0/24) to calculate subnet mask, host range, broadcast address, and more. All calculations run locally in your browser.

Try:
🌐 Network Information
IP Address
CIDR Prefix
Subnet Mask
Wildcard Mask
Network Address
Broadcast Address
📡 Usable Host Range
First Host
Last Host
Total IPs
Usable Hosts
🔢 Binary & Hex Representation
IP (Binary)
Subnet Mask (Binary)
IP (Hex)
Network (Hex)
🏷️ Classification
IP Class
IP Type
Integer Representation
📋 Common Subnet Reference
CIDR Subnet Mask Hosts Subnets (/24)

🔒 All calculations are performed locally in your browser. No data is sent to any server.

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