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Center for Applied Internet Data Analysis
A Historical View of the AS Core

Since 2000, CAIDA has generated AS Core graphs -- Internet Topology Maps also referred to as AS-level Internet Graphs -- in order to visualize the shifting topology of the Internet over time, as can be seen in the historical view.

Versions of the AS core made at different times give a historical perspective on how the global Internet is changing.
|   IPv4 & IPv6 AS Core    Historical view    IPv4 Data Access   |

Historical View

The images below expand to a larger version, and bulleted links in the right column lead to related write-ups and analyses.

2015
Jan
IPv4 AS Core January 2015 IPv6 AS Core January 2015
42,048,676 IP addresses, 33,899,735 IP links, 281 million destinations, 92.7% of globally routable network prefixes, 39,809 Autonomous Systems (ASes), 152,438 peering sessions. Data collected from 118 monitors located in 42 countries on 6 continents.
Data source: Ark
71,391 IPv6 addresses, 186,567 IPv6 links, 4.9 million destinations, 89.3% of globally routeable network prefixes, 5,326 Autonomous Systems (ASes), 21,820 peering sessions. Data collected from 47 Ark monitors located in 25 countries on 6 continents.
Data source: Ark
2014
Jan
IPv4 AS Core January 2014 IPv6 AS Core January 2014
37,541,408 IP addresses, 31,075,574 IP links, 263 million destinations, 92.4% of globally routable network prefixes, 37,197 Autonomous Systems (ASes), 130,095 peering sessions. Data collected from 74 monitors located in 33 countries on 6 continents.
Data source: Ark
51,884 IPv6 addresses, 133,988 IPv6 links, 3.3 million destinations, 76.1% of globally routeable network prefixes, 4,337 Autonomous Systems (ASes), 16,856 peering sessions. Data collected from 33 Ark monitors located in 21 countries on 6 continents.
Data source: Ark
2013
Jan
IPv4 AS Core January 2013 IPv6 AS Core January 2013
27,954,132 IP addresses, 23,494,835 IP links, 214 million destinations, 93.5% of globally routable network prefixes, 34,082 Autonomous Systems (ASes), 109,354 peering sessions. Data collected from 58 monitors located in 29 countries on 6 continents.
Data source: Ark
36,055 IPv6 addresses, 91,420 IPv6 links, 2 million destinations, 82.2% of globally routeable network prefixes, 2,419 Autonomous Systems (ASes), 8,881 peering sessions. Data collected from 26 Ark monitors located in 18 countries on 6 continents.
Data source: Ark
2012
Jan
IPv4 AS Core January 2012 IPv6 AS Core January 2012
22,295,909 IP addresses, 18,968,662 IP links, 192 million destinations, 87% of globally routable network prefixes, 30,799 Autonomous Systems (ASes), 95,242 peering sessions. Data collected from 51 monitors located in 25 countries on 6 continents.
Data source: Ark
24,725 IPv6 addresses, 60,860 IPv6 links, 1.4 million destinations, 92% of globally routeable network prefixes, 1,923 Autonomous Systems (ASes), 7,605 peering sessions. Data collected from 23 Ark monitors located in 14 countries on 6 continents.
Data source: Ark
2011
Apr
IPv4 AS Core April 2011 IPv6 AS Core April 2011
23,037,154 IP addresses, 20,187,579 IP links, 207 million destinations, 93.3% of globally routable network prefixes, 29,316 Autonomous Systems (ASes), 77,610 peering sessions. Data collected from 54 monitors located in 29 countries on 6 continents.
Data source: Ark
14,683 IPv6 addresses, 33,927 IPv6 links, 307 thousand destinations, 71.9% of globally routeable network prefixes, 1,183 Autonomous Systems (ASes), 2,738 peering sessions. Data collected from 16 Ark monitors located in 12 countries on 4 continents.
Data source: Ark
2010
Aug
IPv4 AS Core August 2010 IPv6 AS Core August 2010
16,802,061 IP addresses, 18,796,744 IP links, 174 million destinations, 96% of globally routable network prefixes, 26,702 Autonomous Systems (ASes), 85,104 peering sessions. Data collected from 45 monitors located in 24 countries on 6 continents.
Data source: Ark
8,551 IPv6 addresses, 21,852 IPv6 links, 307 thousand destinations, 99.6% of globally routeable network prefixes, 715 Autonomous Systems (ASes), 1,672 peering sessions. Data collected from 12 Ark monitors located in 6 countries on 3 continents.
Data source: Ark
2009
Jan
IPv4 AS Core January 2009 IPv6 AS Core January 2009
4,853,911 IP addresses, 5,682,419 IP links, 7.4 million destinations, 95% of globaly routable network prefixes, 17,791 Autonomous Systems (ASes), 50,333 peering sessions. Data collected from 33 monitors located in 30 countries on 5 continents.
Data source: Ark
4,752 IPv6 addresses, 17,036 IPv6 links, 1,491 destinations, 88.9% of globally routeable network prefixes, 489 Autonomous Systems (ASes), 1,904 peering sessions. Data collected from 6 Ark monitors located in 4 countries on 2 continents.
Data source: Ark
2008
Jan
AS Core IPv4 2008 AS Core IPv6 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. Data collected from 13 monitors located in 11 countries on 3 continents.
Data source: Ark
4,752 IPv6 addresses, 17,036 IPv6 links, 2,358 destinations, 80% of globally routable network prefixes, 489 Autonomous Systems (ASes), 1,904 peering sessions. Data collected from 56 contributors in 53 different cities located in 9 countries on 3 continents.
Data source: volunteer data
2007
Aug
AS Core IPv4 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.
Data source: Ark
2005
Apr
AS Core IPv4 2005 AS Core IPv6 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.
Data source: Ark
2,913 IPv6 addresses, 7,905 IPv6 links, 333 Autonomous Systems (ASes), 1,304 peering sessions. Data collected from 17 contributors on 3 continents.
Data source: volunteer data
2003
Apr
AS Core IPv4 March 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.
Data source: skitter
2002
Apr
AS Core IPv4 April 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.
Data source: skitter
2001
Jul
AS Core IPv4 July 2001
Data source: skitter
2000
Oct
AS Core IPv4 October 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.
Data source: skitter
2000
Jan
IPv4 AS Core January 2009
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).
Data source: skitter

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  Last Modified: Fri Oct-30-2015 12:59:47 PDT
  Page URL: http://www.caida.org/research/topology/as_core_network/historical.xml