This draft proposes a naming convention for encoding CIDR address
blocks into the reverse DNS namespace. The reverse DNS naming method
is commonly used to specify a complete IP address. This document
describes how to encode an IPv4 or IPv6 CIDR address block such as
184.108.40.206/17. By defining a common naming convention, one can
associate information with a prefix. The convention builds on past
work in RFC 1101 that associates network names with prefixes.
However, this previous work pre-dated the introduction of CIDR and
has several critical ambiguities. This convention corrects the
ambiguities and enables new applications ranging from routing
information to geolocation.