This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. The Domain Name System is primarily used to translate domain names into IPv4 addresses using A RRs.
Several approaches exist to describe networks or address ranges.
In older BIND versions, a weak form of controlling access to zone data was implemented using TXT RRs describing address ranges. This document specifies a new RR type for address prefix lists. APL RRs cause no additional section processing. Upper and lower bounds and interpretation of this value are address family specific. Future revisions may deal with additional address families.