CNAME Discovery of Local DoH Resolvers

Document Type Expired Internet-Draft (individual)
Authors Eric Rescorla  , Jason Livingood 
Last updated 2020-12-27 (latest revision 2020-06-25)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This note describes a simple mechanism for determining whether an Internet Service Provider (ISP) network is operating a DNS over HTTPS [RFC8484] server on it for users connected to that network. Discussion Venues This note is to be removed before publishing as an RFC. Source for this draft and an issue tracker can be found at (


Eric Rescorla (
Jason Livingood (

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