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CAIDA: Cooperative Association for Internet Data Analysis
AS ranking

-----summary of contents-----
This CGI script presents CAIDA's ranking of Autonomous Systems (AS). We provide two ranking methods: degree-based and AS-relationship-based. In degree mode, ASes are ranked by their degrees in the skitter-derived AS topology graph (skitter is a traceroute-based topology measurement tool). In AS-relationship mode, ASes are ranked by their customer cone sizes defined by AS relationships inferred from RouteViews BGP table dumps.
-----end summary of contents-----

Cooperative Association for Internet Data Analysis (CAIDA)
CAIDA AS ranking
ranking mode:   relationship based     
dataset:  
prune customer cone using inferred peer-to-peer links
sort ASes by:   sorted from left to right.
ASes to display:   ASes ranking in the top
all available ASes
aggregate ASes:   none, treat each AS individually
whois grouping: (details)
custom grouping:
text: space-delimited ASes per group; one group per line

file: (must be in same format as above)
format:   HTML table
ASCII tab-delimited table
rank AS
number
AS information customer cone degree
ISP's namecountry/24sprefixesASes
17018AT&T WorldNet Services US6,774,087235,72626,1582,077
23356Level 3 Communications, LLC US6,419,393227,38124,7371,823
31239Sprint US5,598,724210,76422,5071,663
4174Cogent Communications US5,401,814201,55821,7641,703
53549Global Crossing US5,383,452205,09321,9031,063
63561Savvis US5,346,719198,44221,144493
72914NTT America, Inc.US5,292,545195,07220,713564
84323Time Warner Telecom US5,155,364190,82920,2891,005
9701UUNET Technologies, Inc. US4,996,862192,24920,3672,571
10702MCI EMEA NL4,918,448183,87619,658520
ranking mode: relationship based, pruning customer cone with inferred p2p links
alpha parameter: 0.00938
Whois: Feb 23, 2006 - AFRINIC, APNIC, ARIN, LACNIC, and RIPE
AS links: BGP RIBs from RouteViews (rv2)
AS links: 5 days starting on Apr 28, 2008 (15 snapshots at 8 hour intervals)
prefix-to-AS mappings: RouteViews BGP snapshot on Mar 26, 2008

Support for this work was provided by the Cisco University Research program and by NSF CNS-0434996, with previous support from DHS/NCS.

Cooperative Association for Internet Data Analysis (CAIDA)

Page URL: http://as-rank.caida.org/
Last updated:
Maintained by:Brad Huffaker