Skip to Content
[CAIDA - Center for Applied Internet Data Analysis logo]
Center for Applied Internet Data Analysis > data : active : ipv4_2013_census_dataset.xml
IPv4 2013 Census Dataset
This dataset is a list of IPv4 /24 address blocks labeled with their origin AS and inferred utilization mode.

IPv4 2013 Census Dataset

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.

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 IPv4 2013 Census Dataset,
Also, please, report your publication to CAIDA.

Request Data Access

  Last Modified: Tue Jul-28-2020 14:30:27 UTC
  Page URL: