1. Caida. Archipelago measurement infrastructure. http://www.caida.org/projects/ark/. Caida. Archipelago measurement infrastructure. http://www.caida.org/projects/ark/.
2. Caida. Mapping Autonomous Systems to Organizations. https://www.caida.org/research/topology/as2org/. Caida. Mapping Autonomous Systems to Organizations. https://www.caida.org/research/topology/as2org/.
3. CIDR Report. www.cidr-report.org/. CIDR Report. www.cidr-report.org/.
4. RIS - RIPE Network Coordination Centre. http://ris.ripe.net/. RIS - RIPE Network Coordination Centre. http://ris.ripe.net/.
5. University of Oregon RouteViews project. http://www.routeviews.org/. University of Oregon RouteViews project. http://www.routeviews.org/.