To request access this dataset you will need to login with an IMPACT account. Accounts are free. If you don't have one please register.


CAIDA UCSD IPv4 2013 Census Dataset
UCSD - Center for Applied Internet Data Analysis
UCSD - Center for Applied Internet Data Analysis
44 (lowest rank is 50)

Category & Restrictions

Address Space Status Data


IPv4 address taxonomy for 24 addr blocks

We infer utilization of the IPv4 address space and taxonomize //24 address blocks by analyzing and cross-correlating the following measurement datasets, all collected between July and October 2013: 4 types of passive traffic traces (from a darknet, an academic ISP, an IXP, and a residential ISP), 3 types of active measurements (ICMP ping, HTTP GET, traceroutes), BGP data, IPv4 address allocation data, and derived data about geolocations and ASes.

The methodology is described in the paper A. Dainotti, K. Benson, A. King, B. Huffaker, E. Glatz, X. Dimitropoulos, P. Richter, A. Finamore, and A. Snoeren, /"Lost in Space: Improving Inference of IPv4 Address Space Utilization/", IEEE Journal on Selected Areas in Communications (JSAC), 20i6.

Each /24 address block in the dataset is classified as /"ietf-reserved/", /"used/", /"routed unused/", /"unrouted assigned/", /"available/" and is    labeled with the Autonomous System Number that announced in BGP the longest network prefix containing that address block.

This dataset can be used to infer utilization of the IPv4 address space by Registries, ASes, and countries, to provide more realistic routed address space metrics used for estimates of the size, degree, type, or maliciousness of ASes, and to improve the accuracy of analysis of address blocks transfers in the grey market.

Additional Details

census data, dark web, bgp table, darknet, san diego supercomputer center, autonomous system number, address space, richter, internet protocol, address allocation, autonomous system, king, hypertext transfer protocol, caida, routing protocol, internet exchange point, university of california, internet control message protocol, border gateway protocol, ip address, internet layer protocols, routing table, http, 608, ucsd - center for applied internet data analysis, network layer protocols, utilization of the ipv4 address space, as number, network analyzers, ping, communication protocol, cyberinfrastructure, traceroute, center for applied internet data analysis, ipv4 address, trace, ipv4, benson, internet service provider, dainotti, registry, snoeren, huffaker, ucsd, passive traffic trace, network architecture, finamore, internet protocol internet protocol version 4, darknet market, dimitropoulos, networking algorithms, virtual private network, location, bgp peer, glatz, caida ucsd ipv4 2013 census dataset, asn, geographic location, geolocation