Google, LLC Google, LLC This document modifies the requirement introduced in Section 3.1 of RFC6052 that IPv4/IPv6 Translators MUST NOT use the Well-Known Prefix 64:ff9b::/96 to represent non-globally reachable IPv4 addresses, such as those defined in RFC1918 or listed in Section 2.2.2 of RFC6890. The proposed change enables IPv6-only nodes to reach IPv4-only services with specific non-globally reachable addresses by leveraging the Well-Known Prefix. This document updates Section 3.1 of RFC6052 ("Restrictions on the Use of the Well-Known Prefix") to allow packets in which an address is composed of the Well-Known Prefix and specific non-globally reachable IPv4 addresses to be translated.