Extension - arpa

The top-level domain (.arpa) is a specially reserved generic top-level domain (gTLD) primarily used for infrastructure domains on the internet. The .arpa domain is unique as it is managed by the Internet Assigned Numbers Authority (IANA) and is used for technical purposes such as reverse DNS lookups and IP address management. This domain plays a critical role in the functioning of the internet by assisting in translating IP addresses to hostnames and managing crucial technical data.