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Complete Routed-Space DNS Lookups
This dataset contains PTR and SOA DNS lookups of every routed IPv4 address. We use our own parallel DNS query tool to perform the DNS lookups from a single host at CAIDA over a period of 3-4 weeks.

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Complete Routed-Space DNS Lookups

In the 2014-08-22 dataset, we queried 2.7 billion addresses in 10.6 million /24 prefixes (for this particular dataset, we did not query the .0 and .255 addresses in each /24, but all future datasets will query these as well).

Acceptable Use Agreement

Access to these data is subject to the terms of the following CAIDA Acceptable Use Agreement (printable version in PDF format)

When referencing this data (as required by the AUA), please use:

The CAIDA UCSD Complete Routed-Space DNS Lookups Dataset - <dates used>,
Also, please, report your publication to CAIDA.

Request Data Access

  • Request Access to the CAIDA Complete Routed-Space DNS Lookups Dataset

Topology Datasets


For more information on CAIDA topology measurements, see:

For more information on topology measurements in general see:

  Last Modified: Wed Jun-13-2018 14:00:36 PDT
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