Overview

The ARIN CIDR Calculator is a free, web-based tool provided by the American Registry for Internet Numbers (ARIN). It allows network administrators, engineers, and IT professionals to convert IP address ranges to CIDR (Classless Inter-Domain Routing) notation and vice versa. This functionality is crucial for efficient IP address management and network planning. By inputting an IP address range or CIDR notation, users can quickly determine the corresponding range or notation, facilitating tasks such as subnetting and IP address allocation. This tool is particularly beneficial for organizations managing large networks or those involved in network infrastructure planning.

Features and Capabilities

• IP Range to CIDR Conversion: Convert a specified IP address range into CIDR notation, aiding in efficient subnetting and IP address allocation.
• CIDR to IP Range Conversion: Determine the IP address range corresponding to a given CIDR notation, assisting in network planning and management.
• Support for IPv4 and IPv6: Handle both IPv4 and IPv6 addresses, ensuring compatibility with modern networking standards.
• User-Friendly Interface: Designed for ease of use, allowing users to perform conversions without the need for advanced networking knowledge.
• Free Access: Available at no cost, making it accessible to a wide range of users, from individuals to large organizations.
• No Registration Required: Users can access and use the tool without the need to create an account or log in.
• Web-Based Platform: Accessible from any device with an internet connection, providing flexibility and convenience.
• No Installation Needed: Being a web-based tool, there is no need to install any software, saving time and system resources.
• Regular Updates: Maintained by ARIN, ensuring the tool stays current with the latest IP addressing standards and practices.