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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 rank | AS number | AS name | Org name | customer cone | AS degree | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of | Percentages of all | ||||||||||||||||||||||||
| ASes | IPv4 Prefixes | IPv4 Addresses | ASes | IPv4 Prefixes | IPv4 Addresses | ||||||||||||||||||||
| 1 | 3356 | LEVEL3 | Level 3 Communications | 22,664 | 233,628 | 1,354,478,026 |
51%
|
55%
|
52%
|
3639 | |||||||||||||||
| 2 | 3549 | LVLT-3549 | Level 3 Communications | 15,102 | 178,517 | 660,620,129 |
34%
|
42%
|
25%
|
3290 | |||||||||||||||
| 3 | 3257 | TINET-BACK... | Tinet SpA | 14,872 | 169,885 | 675,194,452 |
33%
|
40%
|
26%
|
942 | |||||||||||||||
| 4 | 174 | COGENT-174 | Cogent/PSI | 13,593 | 133,479 | 568,635,158 |
30%
|
31%
|
22%
|
3855 | |||||||||||||||
| 5 | 1299 | TELIANET | TeliaNet Global Network | 12,670 | 142,438 | 575,843,917 |
28%
|
34%
|
22%
|
764 | |||||||||||||||
| 6 | 2914 | NTT-COMMUN... | NTT America, Inc. | 11,153 | 149,302 | 687,052,839 |
25%
|
35%
|
26%
|
930 | |||||||||||||||
| 7 | 6453 | AS6453 | TATA Communications | 6,765 | 102,736 | 426,732,454 |
15%
|
24%
|
16%
|
660 | |||||||||||||||
| 8 | 701 | UUNET | MCI Communications Services, Inc. d/b/a Verizon Business | 4,919 | 82,537 | 692,951,401 |
11%
|
19%
|
27%
|
1697 | |||||||||||||||
| 9 | 6762 | SEABONE-NET | TELECOM ITALIA SPARKLE S.p.A. | 4,806 | 55,761 | 170,404,597 |
10%
|
13%
|
6.7%
|
282 | |||||||||||||||
| 10 | 2828 | XO-AS15 | XO Communications | 4,113 | 72,458 | 343,947,285 |
9.3%
|
17%
|
13%
|
1047 | |||||||||||||||
| |||||||||||||||||||||||||
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.