An efficient method to publish ranges of IP addresses in the DNS

Document Type Expired Internet-Draft (individual)
Author John Levine 
Last updated 2011-03-14
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The DNS has long been used to publish lists of IPv4 address ranges in blacklists and whitelists. The size of the IPv6 address space makes the entry-per-IP approach used for IPv4 lists impractical. A new technique for publishing IP address ranges is described. It is intended to permit efficient publishing and querying, and to have good DNS cache behavior.


John Levine (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)