Passive DNS - Common Output Format

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Last updated 2017-12-15 (latest revision 2017-06-13)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a common output format of Passive DNS Servers which clients can query. The output format description includes also in addition a common semantic for each Passive DNS system. By having multiple Passive DNS Systems adhere to the same output format for queries, users of multiple Passive DNS servers will be able to combine result sets easily.


Alexandre Dulaunoy (
Aaron Kaplan (
Paul Vixie (
Henry Stern (

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