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A Historical Look at the AS Core
Versions of the AS core made at different times give a historical perspective on how the global Internet is changing.
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A Chronology of Views of the IPv4 AS Core

  • Image: Jan, 2009
  • Image: Jan 1 - Jan 17, 2008
      4,853,991 IP addresses, 5,682,419 IP links, 48 million destinations, 94.9% of globally routable network prefixes, 17,791 Autonomous Systems (ASes), 50,333 peering sessions.   (analysis)
  • Image: Jul 2 - Jul 9, 2007
      760,922 IP addresses, 1,400,796 IP links, 1 million destinations, 26.7% of globally routable network prefixes, 12,465 Autonomous Systems (ASes), 35,589 peering sessions.   (analysis)
  • Image: Apr 4 - Apr 17, 2005
      926,201 IP addresses, 2,000,796 IP links, 865,000 destinations, 50% of globally routable network prefixes; 10,131 ASes (78% of ASes present in RouteViews BGP tables on Apr 17, 2005), 29,191 peering sessions.
  • Image: Apr 21 - May 8, 2003
      1,134,634 IP addresses, 2,434,073 IP links, 865,000 destinations, 62% of globally routable network prefixes; 11,411 ASes (73% of ASes present in RouteViews BGP tables on May 8, 2003), 32,209 peering sessions.
  • Image: Apr 1 - Apr 16, 2002
      1,224,733 IP addresses, 2,093,194 IP links, 932,000 destinations, 70% of globally routable network prefixes; 10,999 ASes (84% of ASes present in RouteViews BGP tables on April 15,2002), 34,209 peering sessions.
  • Image: Jul 23 - Aug 1, 2001
  • Image: Oct 2 - Oct 15, 2000
      626,773 IP addresses, 1,007,723 IP links, 52% of globally routable network prefixes; 7,563 ASes (81% of A Ses present in RouteViews BGP tables on October 15,2000), 25,005 peering sessions.
  • Image: Jan 15 - Jan 22, 2000
      220,533 IP addresses, 374,013 IP links, 154,104 destinations, 5,107 ASes (7% of ASes present in RouteViews BGP tables on January 16, 2000)

A Chronology of Views of the IPv6 AS Core

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IPv4 IPv6
Jan 2009 Jan 2009
Jan 2008 Jan 2008
July 2007
April 2005 Mar 2008
April 2003
April 2002
July 2001
October 2000
January 2000
  Last Modified: Wed Sep-2-2009 12:46:11 PDT
  Page URL: http://www.caida.org/research/topology/as_core_network/historical.xml