Autonomous systems
Top ASNs by IPv4 address space
Ranked by total announced IPv4 address space. Related ASNs are grouped by organization.
Leaderboard
Top ASNs by IPv4 addresses
Each entry links to the ASN detail page and related ASNs.
| Rank | ASN | Organization | IPv4 addresses | Related ASNs |
|---|---|---|---|---|
| 1 | AS749 |
United States Department of Defense (DoD)
|
224 169 216 | |
| 2 | AS16509 |
Amazon.com Inc.
|
157 544 448 | |
| 3 | AS4134 |
China Telecom
|
110 703 872 | |
| 4 | AS7018 |
AT&T Enterprises LLC
|
92 815 104 | |
| 5 | AS721 |
United States Department of Defense (DoD)
|
72 101 120 | |
| 6 | AS7922 |
Comcast Cable Communications LLC
|
68 025 856 | |
| 7 | AS8075 |
Microsoft Corporation
|
65 668 864 | |
| 8 | AS4837 |
CHINA UNICOM China169 Backbone
|
57 670 912 | N/A |
| 9 | AS4766 |
Korea Telecom
|
47 195 648 | |
| 10 | AS701 |
Verizon Business
|
41 417 472 | |
| 11 | AS17676 |
SoftBank Corp.
|
37 667 328 | |
| 12 | AS174 |
Cogent Communications LLC
|
35 922 688 | |
| 13 | AS9808 |
China Mobile
|
35 754 496 | |
| 14 | AS3320 |
Deutsche Telekom AG
|
34 207 744 | |
| 15 | AS22394 |
Verizon Business
|
30 306 048 | |
| 16 | AS3356 |
Level 3 Parent LLC
|
28 882 432 | |
| 17 | AS4713 |
NTT DOCOMO BUSINESS Inc.
|
28 626 432 | |
| 18 | AS3269 |
Telecom Italia S.p.A.
|
20 787 968 | |
| 19 | AS3215 |
Orange S.A.
|
20 069 632 | |
| 20 | AS209 |
CenturyLink Communications LLC
|
20 004 352 | |
| 21 | AS396982 |
Google LLC
|
19 934 976 | |
| 22 | AS14618 |
Amazon.com Inc.
|
19 441 920 | |
| 23 | AS2516 |
KDDI CORPORATION
|
18 034 176 | N/A |
| 24 | AS714 |
Apple Inc.
|
17 990 144 | |
| 25 | AS4538 |
China Education and Research Network Center
|
17 174 784 | N/A |
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