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IPv4 Routed /24 DNS Names Dataset
The IPv4 Routed /24 DNS Names Dataset provides fully-qualified domain names for IP addresses seen in the traces of the IPv4 Routed /24 Topology Dataset.
DNS names are useful for obtaining additional information about routers and hosts making up the Internet topology. For example, DNS names of routers often encode the link type (backbone vs. access), link capacity, Point of Presence (PoP), and geographic location. We have DNS Names data starting March 2008.
These datasets result from CAIDA's large-scale traceroute-based measurements running on the Archipelago (Ark) measurement infrastructure (also see CAIDA's Macroscopic Topology Project).
We perform these DNS lookups centrally at CAIDA using a custom-built bulk DNS lookup service. This service performs millions of DNS lookups per day. In general, we perform DNS lookups soon after we collect the topology traces so that the results better match the state of the Internet at trace collection time. However, to avoid undue load on remote DNS nameservers and to keep the daily lookup volume at a manageable level, we never perform a lookup for an address if we have successfully obtained a result in the preceding 7 days. Apart from this 7-day rule, we always perform a lookup whenever we encounter an IP address in traces. This means that we do repeat lookups at 7-day granularity for addresses that repeatedly occur in the traces. If the first attempt to look up a given IP address fails, then we retry up to two more times, waiting about one day between retries.
Acceptable Use Policy for the files of the IPv4 Routed /24 DNS Names Dataset
- At the end of the research, or semi-annually (which ever is more frequent), a summary of the research and any findings/conclusions will be reported to CAIDA. If any research is described on the WWW, a URL will be provided. This information is primarily used in reports to our funding agencies.
- In so far as possible, research findings and conclusions using the topology data will be published and/or made publicly available.
- All users who publish a document (including web pages and papers) using data from the topology data must provide CAIDA with a copy of the publication.
- All users who publish a document (including web pages, and papers) using data from this dataset must cite:
The IPv4 Routed /24 DNS Names Dataset - <dates used>,
Young Hyun, Bradley Huffaker, Dan Andersen, Emile Aben, Ryan Koga, Matthew Luckie, and k claffy
http://www.caida.org/data/active/ipv4_dnsnames_dataset.xml.- Users are encouraged, but not required, to include the following attribution in the acknowledgments section of their document:
Support for the IPv4 Routed /24 DNS Names Dataset is provided by the National Science Foundation, the US Department of Homeland Security, the WIDE Project, Cisco Systems, and CAIDA Members.
- All users who create a publicly available presentation using data from this dataset must provide CAIDA with a copy of the presentation and must use the full name of the dataset ("The IPv4 Routed /24 DNS Names Dataset") in the presentation. Users are further encouraged, but not required, to include the URL for the dataset (http://www.caida.org/data/active/ipv4_dnsnames_dataset.xml) in their presentation.
IPv4 Routed /24 DNS Names Dataset Access
Request Access to IPv4 Routed /24 DNS Names Data
Acknowledgments
The IPv4 Routed /24 DNS Names was sponsored by:
References
For more information on topology measurements see:
