arpaname

Arpaname is a command line tool used to translate IP addresses to Autonomous System (AS) numbers. It is based on the Regional Internet Registry (RIR) databases, which allocate and manage IP address blocks.

The tool takes an IP address as input and returns the corresponding AS number. It can be helpful for network administrators and operators to identify the owning entity or organization of a specific IP address.

Arpaname utilizes the Whois protocol to retrieve information from RIR databases. It supports both IPv4 and IPv6 addresses, ensuring compatibility with the latest IP addressing standards.

The tool is written in the C programming language and is available for UNIX-like operating systems, including Linux and macOS. It can be easily installed and used from the command line without requiring any additional dependencies.

Arpaname provides a simple and efficient way to perform reverse IP lookups and obtain AS information. It can be integrated into scripts, automation tools, or used manually as a stand-alone utility.

The output of arpaname contains the AS number, the organization name associated with the AS, and the RIR from which the information was obtained. This allows users to have a comprehensive view of the ownership information related to an IP address.

Arpaname is regularly updated with the latest RIR databases to ensure accurate and up-to-date results. It provides reliable information for a wide range of IP addresses, including those allocated to Internet Service Providers (ISPs) and organizations worldwide.

The tool offers flexibility in terms of input format, allowing users to specify IP addresses directly as arguments or through standard input. This makes it convenient to use in various scenarios, such as batch processes or in conjunction with other command line utilities.

Arpaname is a lightweight and efficient utility, designed to provide fast results and minimize system resource usage. It offers a practical solution for network professionals who need to quickly retrieve AS information for IP addresses.