MDN’s new design is in Beta! A sneak peek: https://blog.mozilla.org/opendesign/mdns-new-design-beta/

.arpa (address and routing parameter area) is a top-level domain used for Internet infrastructure purposes, especially reverse DNS lookup (i.e., find the domain name for a given IP address).

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 Contributors to this page: rolfedh, klez, Andrew_Pfeiffer
 Last updated by: rolfedh,