Malware Activity in Hosting Networks (ASNs) July 1,2025 - September 30,2025

To see where malware was being served up, or distributed among peer-to-peer hosts, we collected the IP addresses that malware domains and malware URLs were resolving to when malware activity was reported. We then identified the Autonomous System (ASN) where the IP prefix containing the IP address to identify the hosting network where malware were reported.

IPv4 addresses may be reported for hosting one or more malware; for example, two or several URLs may contain the same IPv4 address but the PATHS or QUERIES may identify different malware.

In the table below, we show the twenty hosting networks with the highest numbers of IPv4 addresses reported as serving up or distributing malware (“Unique Malware Addresses”). Complete lists of ASNs where malware was reported for the quarter can be downloaded in CSV format from the Records page.

Ranking of Hosting Networks (ASNs) by Number of Malware Records (July to September 2025)

Rank AS Name AS number # Routed
IPv4 Addresses		 Unique Malware Addresses Total Malware Records ▼
1 CHINA UNICOM China169 Backbone 4837 59,353,600 58,870 105,869
2 DigitalOcean, LLC 14061 3,023,616 50,052 50,618
3 Bharat Sanchar Nigam Ltd 9829 7,285,504 46,448 50,123
4 No.31,Jin-rong Street 4134 128,037,888 35,980 38,930
5 Google LLC 396982 53,825,536 35,373 35,838
6 Millenicom Telekomunikasyon Hizmetleri Anonim Sirketi 34296 45,312 33,296 33,296
7 PENTECH BILISIM TEKNOLOJILERI SANAYI VE TICARET LIMITED SIRKETi 48678 76,800 20,783 20,795
8 TE-AS 8452 21,058,816 18,266 18,270
9 Amazon.com, Inc. 16509 216,344,832 13,275 17,253
10 TOT Public Company Limited 23969 4,589,568 13,513 13,593
11 Chunghwa Telecom Co., Ltd. 3462 13,345,280 11,080 11,121
12 Amazon.com, Inc. 14618 19,340,544 8,695 10,475
13 VNPT Corp 45899 15,780,096 10,036 10,344
14 Startup maintainer 58224 3,860,736 9,990 10,149
15 Microsoft Corporation 8075 66,561,280 7,767 8,954
16 Uninet S.A. de C.V. 8151 20,345,344 8,867 8,923
17 FPT Telecom Company 18403 5,125,632 8,371 8,456
18 Cloudflare, Inc. 13335 1,388,288 3,554 8,161
19 PJSC Rostelecom 12389 20,732,416 7,893 8,067
20 Viettel Group 7552 21,323,264 7,910 8,040

Ranking of Hosting Networks (ASNs) by Number of Unique Malware Addresses (July to September 2025)

Rank AS Name AS number # Routed
IPv4 Addresses		 Unique Malware Addresses ▼ Total Malware Records
1 CHINA UNICOM China169 Backbone 4837 59,353,600 58,870 105,869
2 DigitalOcean, LLC 14061 3,023,616 50,052 50,618
3 Bharat Sanchar Nigam Ltd 9829 7,285,504 46,448 50,123
4 No.31,Jin-rong Street 4134 128,037,888 35,980 38,930
5 Google LLC 396982 53,825,536 35,373 35,838
6 Millenicom Telekomunikasyon Hizmetleri Anonim Sirketi 34296 45,312 33,296 33,296
7 PENTECH BILISIM TEKNOLOJILERI SANAYI VE TICARET LIMITED SIRKETi 48678 76,800 20,783 20,795
8 TE-AS 8452 21,058,816 18,266 18,270
9 TOT Public Company Limited 23969 4,589,568 13,513 13,593
10 Amazon.com, Inc. 16509 216,344,832 13,275 17,253
11 Chunghwa Telecom Co., Ltd. 3462 13,345,280 11,080 11,121
12 VNPT Corp 45899 15,780,096 10,036 10,344
13 Startup maintainer 58224 3,860,736 9,990 10,149
14 Uninet S.A. de C.V. 8151 20,345,344 8,867 8,923
15 Amazon.com, Inc. 14618 19,340,544 8,695 10,475
16 FPT Telecom Company 18403 5,125,632 8,371 8,456
17 Viettel Group 7552 21,323,264 7,910 8,040
18 PJSC Rostelecom 12389 20,732,416 7,893 8,067
19 Microsoft Corporation 8075 66,561,280 7,767 8,954
20 NTT Communications Corporation 4713 28,713,728 7,073 7,098

Quarterly Update:
Key Statistics		 Quarterly Update:
Top Level Domains		 Quarterly Update:
Registrars		 Quarterly Update:
Hosting Networks
Quarter over Quarter:
Hosting Networks