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BCP 163 contains the following RFCs:
NumberFilesTitleAuthorsDateMore InfoStatus
RFC 6303, BCP 163    Locally Served DNS ZonesM. AndrewsJuly 2011    Best Current Practice
RFC 7793, BCP 163    Adding Prefixes to the IPv4 Locally-Served DNS Zones RegistryM. AndrewsMay 2016    Best Current Practice

Abstract of RFC 6303

Experience with the Domain Name System (DNS) has shown that there are a number of DNS zones that all iterative resolvers and recursive nameservers should automatically serve, unless configured otherwise. RFC 4193 specifies that this should occur for D.F.IP6.ARPA. This document extends the practice to cover the IN-ADDR.ARPA zones for RFC 1918 address space and other well-known zones with similar characteristics. This memo documents an Internet Best Current Practice.

Abstract of RFC 7793

RFC 6598 specifies that "Reverse DNS queries for Shared Address Space addresses [] MUST NOT be forwarded to the global DNS infrastructure."

This document formally directs IANA to add the associated zones to the "IPv4 Locally-Served DNS Zones Registry" to prevent such queries from accidentally leaking to the global DNS infrastructure.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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