The Internet Corporation for Assigned Names and Numbers (ICANN) is seeking input on a study conducted to identify one or more IPv6 candidate prefixes that may be suitable for use in an AAAA record during controlled interruption, which is a name collision mitigation strategy.
This study involved a review of the Internet Assigned Numbers Authority registries for IPv6 to produce a list of candidate addresses, followed by technical tests of multiple applications on popular end-user operating systems, to determine whether or not Domain Name System lookups that produce responses containing these addresses result in external network traffic.
For more information and to participate in the proceeding, please visit the Public Comment webpage.
Submissions Opening Date: Monday, 20 October 2025
Submissions Closing Date: Monday, 22 December 2025