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This page presents the BETA version of AS Rank, CAIDA's ranking of Autonomous Systems (AS) (which approximately map to Internet Service Providers) and organizations (Orgs) (which are a collection of one or more ASes). This ranking is derived from topological data collected by CAIDA's Archipelago Measurement Infrastructure and Border Gateway Protocol (BGP) routing data collected by the Route Views Project and RIPE NCC.
ASes and Orgs are ranked by their customer cone size, which is the number of their direct and indirect customers. Note: We do not have data to rank ASes (ISPs) by traffic, revenue, users, or any other non-topological metric.
AS Ranking Help
Description
Our AS Ranking page uses publicly available BGP data to rank ASes according to the number of ASes they can reach recursively through their customers and their customers' customers. We call this set of ASes the 'customer cone' for a given AS, which approximately represents the ASes that directly or indirectly pay for transit through the given AS.
Controls
Find this AS
Enter either the AS (Autonomous System) name (e.g., Level 3 Communications) or number (e.g., 3356) to look up information about that AS. Entering a partial name, e.g., "Qwest", will return a list of matching ASes.
number to show
Controls the number of ASes to display. The higher the number, the longer the page will take to load.
sorted by
Controls the column by which the ASes should be sorted. When a column is being used to order the list, it will be highlighted in the same style as the words "sorted by".
Table Fields
AS rank
The ranking of the AS by the size of (i.e., number of ASes in) its customer cone.
AS number
This AS number is the identifier for a given Autonomous System, as assigned by the regional registries and the Internet Assigned Numbers Authority (IANA).
AS name
The name for this AS, as seen in the AFRINIC, APNIC, ARIN, LACNIC, or RIPE WHOIS registries. This field is truncated to 20 characters. If no AS name is known, this field will be blank. The full name is visible on a mouse-over, as well as shown on the individual information page for the AS.
Org name
The name for this Org, as seen in the AFRINIC, APNIC, ARIN, LACNIC, or RIPE WHOIS registries. This field is truncated to 20 characters. If no Org name is known, this field will be blank. The full name is visible on a mouse-over, as well as shown on the individual information page for the Org.
customer cone
The customer cone contains the customer ASes of the selected AS, plus other customer ASes reachable from the given AS by recursively following customer links. In other words, A's customer cone contains A, plus A's customers, plus its customers' customers, and so on.
number of ASes
The number of ASes shows the number of customer ASes reachable from the given AS by recursively following customer links.
number of prefixes
The number of prefixes shows the number of customer IPv4 prefixes reachable from the given AS by recursively following customer links.
number of addresses
The number of addresses shows the number of customer IPv4 addresses reachable from the given AS by recursively following customer links.
percentage of all ASes
The percentage of all ASes in the graph contained within the AS's customer cone.
percentage of all prefixes
The percentage of all IPv4 prefixes in the graph contained within the AS's customer cone.
percentage of all addresses
The percentage of all IPv4 addresses in the graph contained within the AS's customer cone.
AS degree
Number of ASes with direct peering or customer-provider links to the neighbor AS. The neighbor's degree typically correlates with its cone size.
Data Sources table
data sources
country
name
topology
See the Data Sources tab for details on the Data Sources table and what the different columns and rows indicate.
Downloads
download rankings data
Links to a pipe-delimited data file containing the entire as rank table of data, including all the fields shown on this page.
download peer relationship data
Links to a pipe-delimited data file containing the relationships between pairs of ASes, indexed by their AS number.
Support for this work is provided by the U.S. Department of Homeland Security's Science and Technology Directorate (Project N66001-08-C-2029), the National Science Foundation Internet Laboratory for Empirical Network Science (Project CNS-0958547), and Cisco's University Research Program.