🌐 IP Address CIDR Calculator
Introduction
CIDR (Classless Inter-Domain Routing) notation is a compact way to represent IP addresses and their associated network masks. The IP Address CIDR Calculator helps you convert between subnet masks and CIDR notation, and calculates network details to streamline your subnetting and network planning.
Why Use an IP Address CIDR Calculator?
Manual conversion between subnet masks and CIDR notation can be confusing and error-prone. This calculator allows you to:
- ✅ Convert subnet masks to CIDR notation and vice versa
- 📊 Calculate network and broadcast addresses from CIDR or subnet masks
- 🧠 Identify usable IP ranges within a subnet
- 🔍 Validate network configurations for accurate IP allocation
- 🚀 Save time and reduce errors in subnet calculations
Ideal for network administrators, IT pros, and students.
How It Works
Input:
- IP Address (IPv4)
- Either Subnet Mask (e.g., 255.255.255.0) or CIDR Notation (e.g., /24)
The calculator outputs:
- CIDR notation for given subnet mask or vice versa
- Network (Subnet) Address
- Broadcast Address
- First and Last Usable IP Addresses
- Number of Usable Hosts
- Subnet Mask in decimal and binary
Example
- IP Address: 10.10.10.10
- Subnet Mask: 255.255.255.0 (or /24)
Results:
- CIDR Notation: /24
- Network Address: 10.10.10.0
- Broadcast Address: 10.10.10.255
- Usable IP Range: 10.10.10.1 – 10.10.10.254
- Usable Hosts: 254
Who Should Use This?
- 💻 Network engineers and administrators
- 🧑🎓 Students learning networking and subnetting
- 🛠️ IT professionals planning and configuring networks
- 🔧 Anyone needing quick and accurate CIDR and subnet info
Key Features
- 🧮 Easy conversion between CIDR and subnet masks
- 📱 Mobile and desktop friendly
- 🖥️ Displays network details clearly and precisely
- 📊 Shows subnet masks in decimal and binary
- ⚡ Speeds up network design and troubleshooting
Tips for Best Use
- Use valid IPv4 addresses and subnet masks or CIDR notation
- Verify outputs before applying network changes
- Combine with other IP tools for full network management
- Learn CIDR basics to maximize the tool’s usefulness
Final Thoughts
The IP Address CIDR Calculator simplifies CIDR and subnet calculations, empowering you to manage IP networks efficiently and accurately.