ARIN, or the American Registry for Internet Numbers, is a nonprofit organization that manages the distribution of Internet number resources, including IPv4 and IPv6 address space, and Autonomous System Numbers (ASNs) within its designated region. This region includes the United States, Canada, and several parts of the Caribbean.
ARIN also maintains a public database, known as WHOIS, that contains information about the IP address assignments and can be used to identify who controls a specific IP address or domain name. This can be particularly useful in situations related to network troubleshooting, cybercrime investigations, and ensuring online accountability.
In the context of domain investing, understanding ARIN and its functions can be useful, especially when dealing with aspects related to hosting, IP address management, and investigating the history or ownership of certain IP addresses or domains.