What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing Internet Protocol packets. It's a fundamental concept in networking that helps in efficient IP address allocation and routing. Today, I'm excited to introduce a modern, interactive CIDR calculator that makes working with IP addresses and subnet calculations a breeze. And it is open source github
Features
The CIDR Calculator comes with a beautiful, modern interface and offers several powerful features:
- Interactive IP Address Input
- Easy-to-use octet-based input system
- Real-time validation of IP addresses
- Visual binary representation of IP addresses
2. Comprehensive CIDR Information
- Network address calculation
- Broadcast address
- Subnet mask
- First and last usable host addresses
- Total number of available hosts
Advanced Information
- Wildcard mask
- IP class identification
- Host address range
- Reverse DNS (PTR) records
- Binary and hexadecimal representations
Practical Examples
Let's look at some practical examples of how to use the CIDR Calculator:
Example 1: Basic Network Configuration
Let's say you want to set up a network with the IP address 192.168.1.0/24:textApply to package.jsonIP Address: 192.168.1.0Prefix Length: 24The calculator will show you:
- Network Address: 192.168.1.0
- Broadcast Address: 192.168.1.255
- Subnet Mask: 255.255.255.0
- First Usable IP: 192.168.1.1
- Last Usable IP: 192.168.1.254
- Total Hosts: 254
Example 2: Smaller Subnet
For a smaller network, you might use 10.0.0.0/28:textApply to package.jsonIP Address: 10.0.0.0Prefix Length: 28This will give you:
- Network Address: 10.0.0.0
- Broadcast Address: 10.0.0.15
- Subnet Mask: 255.255.255.240
- First Usable IP: 10.0.0.1
- Last Usable IP: 10.0.0.14
- Total Hosts: 14
Example 3: Large Network
For a larger network, you might use 172.16.0.0/16:textApply to package.jsonIP Address: 172.16.0.0Prefix Length: 16This will show:
- Network Address: 172.16.0.0
- Broadcast Address: 172.16.255.255
- Subnet Mask: 255.255.0.0
- First Usable IP: 172.16.0.1
- Last Usable IP: 172.16.255.254
- Total Hosts: 65,534
Key Benefits
- User-Friendly Interface
- Clean, modern design
- Real-time calculations
- Visual binary representation
- Copy-to-clipboard functionality
2. Shareable Results
- Generate shareable links
- Copy CIDR notation
- Export results
3. Advanced Features
- IP class detection
- Binary and hex conversions
- PTR record generation
- Wildcard mask calculation
Getting Started
You can start using the CIDR Calculator right away by visiting https://github.com/muhammadarslan/cidr. The interface is intuitive and requires no installation. Simply:
- Enter your IP address
- Select your desired prefix length
- View the comprehensive results
Conclusion
The CIDR Calculator is a powerful tool for network administrators, developers, and anyone working with IP addressing. Its modern interface and comprehensive feature set make it an essential tool for network planning and troubleshooting.Try it out today and simplify your CIDR calculations!