Cybersecurity &
Networking Tools
Turn complex network tasks into simple clicks with fast, accurate, and intuitive cybersecurity utilities
CIDR Notation Parser
Parse and analyze CIDR notation to get network details
CIDR Notation Parser
📄 Summary
The CIDR Notation Parser is a lightweight and fast utility tool that converts any valid IPv4 CIDR block into a complete breakdown including IP range, subnet mask, address count, and class. This is a must-have for network engineers, sysadmins, students, and cybersecurity professionals involved in IP planning or subnetting.
🔍 What Is a CIDR Block?
CIDR (Classless Inter-Domain Routing) is a compact representation of IP address blocks, such as 192.168.1.0/24. The prefix length (e.g., /24) determines the number of bits used for the network portion of the address. It enables more efficient routing and IP address allocation than older class-based systems.
❗ Why Use This Tool?
- To quickly analyze CIDR notation without manual subnetting calculations
- To instantly determine the usable IP range, netmask, and IP class
- To assist in designing networks or configuring firewall rules
✨ Features
- Parses any valid IPv4 CIDR block (e.g., 10.0.0.0/8, 172.16.0.0/12)
- Calculates the full IP range from first to last address
- Displays subnet mask in dotted-decimal format
- Shows total number of addresses in the block
- Identifies IP class (A, B, C, D, or E)
- Built-in light/dark mode switch
📃 How to Use
- Enter a valid CIDR block such as
192.168.0.0/24 - Click the “Parse” button
- View IP range, netmask, address count, and class
- Use the Reset button to start over
💼 Use Cases
- Subnet planning for office or data center networks
- Cloud-based firewall or routing configuration
- Learning subnetting and network design in classrooms
- Validating CIDR blocks for security segmentation
❓ Frequently Asked Questions
What is the subnet mask for /24?
/24 corresponds to 255.255.255.0 which gives 256 total addresses.
Does this tool support IPv6?
No. This parser is designed for IPv4 blocks only.
Is this tool suitable for public and private IP ranges?
Yes. It supports all valid IPv4 address ranges including 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.
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⚠️ Disclaimer
This tool is intended for educational, configuration, and planning purposes only. It does not validate ownership or usage of CIDR ranges. For production networking, verify blocks with your ISP or hosting provider.