Hi meaton, Thanks for your reply. IANA has defined a well-known range, 192.0.0.0/29, in [RFC6333], which is dedicated for DS-Lite. Android implement CLAT since 4.3 version, i will got a 192.0.0.x ip address as expected when i connect to the NAT64 WIFI . iOS 15 /macOS 12 will not got a 192.0.0.x IP assigned on the same NAT64 WIFI. The same issue was found on https://www.reddit.com/r/ipv6/comments/10dylht/ipv6_ipad/. so, I think that 192.0.0.x is not vend back by the AP, but assigned by iOS 16/macOS 13. I doubt the latest macOS/IOS implement CLAT. Can you confirm it with the apple engineer？ ========================= https://www.rfc-editor.org/rfc/rfc7335.html https://www.rfc-editor.org/rfc/rfc6333 https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/UnderstandingandPreparingfortheIPv6Transition/UnderstandingandPreparingfortheIPv6Transition.html#//apple_ref/doc/uid/TP40010220-CH213-SW1 https://www.reddit.com/r/ipv6/comments/10dylht/ipv6_ipad/