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, including the poster versions when available..

2010
Aug


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

2010 AS Core: IPv4 vs IPv6 comparison (poster)

2009
Jan


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

2009 AS Core: IPv4 vs IPv6 comparison (poster)

2008
Jan


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


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

2007 AS Core: IPv4 with analysis

2005
Apr


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

2005 AS Core: IPv4 vs IPv6 comparison

2003
Apr

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

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

2000-2002 AS Core: Animation over 18 months (flipbook/animated gif)

2001
Jul

Data source: skitter

2001 AS Core: IPv4 poster available for purchase

2000
Oct

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 AS Core: IPv4 (poster)

2000
Jan

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

Animation

IPv4 AS Core animation Jul 2000 - Jan 2002

Posters Available for Purchase

July 23 - Aug 1, 2001 (2 styles: vertical and horizontal)