Top ASNs by IPv4 address space

List of countries by IPv4 allocation Top ASNs by IPv4 Top ASNs by IPv6 Top orgs by IPv4

Rank	ASN	Organization	IPv4 addresses	Related ASNs
1	AS749	United States Department of Defense (DoD)	224 164 352	AS721 AS56 AS306
2	AS16509	Amazon.com Inc.	169 791 744	AS14618 AS7224 AS36263
3	AS4134	China Telecom	110 732 800	AS140292 AS140061 AS140293
4	AS7018	AT&T Enterprises LLC	92 875 264	AS6389 AS14654 AS7287
5	AS8075	Microsoft Corporation	81 074 432	AS8070 AS3598 AS8069
6	AS721	United States Department of Defense (DoD)	72 221 440	AS749 AS56 AS306
7	AS7922	Comcast Cable Communications LLC	68 240 384	AS20214 AS21508 AS33651
8	AS4837	CHINA UNICOM China169 Backbone	57 703 936	N/A
9	AS4766	Korea Telecom	47 201 792	AS45400 AS4040 AS3559
10	AS701	Verizon Business	41 644 544	AS22394 AS6167 AS2828
11	AS17676	SoftBank Corp.	38 179 072	AS4725 AS17505 AS146969
12	AS9808	China Mobile	36 735 744	AS24444 AS24445 AS24400
13	AS174	Cogent/PSI	35 869 184	N/A
14	AS3320	Deutsche Telekom AG	34 188 544	AS2773 AS2792 AS2777
15	AS22394	Verizon Business	30 306 048	AS701 AS6167 AS2828
16	AS3356	Level 3 Communications	29 399 552	N/A
17	AS4713	NTT DOCOMO BUSINESS Inc.	28 623 872	AS38639 AS18072 AS37900
18	AS14618	Amazon.com Inc.	21 143 552	AS16509 AS7224 AS36263
19	AS3269	Telecom Italia S.p.A.	20 681 216	AS16232 AS20746 AS5609
20	AS3215	Orange S.A.	20 063 232	AS5511 AS2278 AS2280
21	AS396982	Google LLC	19 940 608	AS15169 AS19527 AS394089
22	AS209	CenturyLink Communications LLC	19 855 360	AS22561 AS2379 AS5778
23	AS2516	KDDI CORPORATION	18 074 112	N/A
24	AS6167	Verizon Business	17 947 136	AS701 AS22394 AS2828
25	AS4538	China Education and Research Network Center	17 174 272	N/A

Top ASNs by IPv4 addresses