CAIDA UCSD IPv4 Routed /24 DNS Names

This 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 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.