Spam Activity in Hosting Networks (ASNs)
September 1,2024 - November 30,2024

To see where spammed content or spambots were being hosted, we collected the IP addresses that spam domains were resolving to when spam activity was detected and added to a threat or block list. We then identified the ASN where the IP prefix containing the IP address was allocated. This number identifies the hosting network where spammed content or a spambot was reported.

In the table below, we show the twenty hosting networks with the highest numbers of reports of spammed content or spambots. Complete lists of ASNs reported for the period can be downloaded in CSV format from the Records page.

Ranking of Hosting Networks (ASNs) by Hosted Spammed Content or Spambots (September to November 2024)

Rank AS Name AS number # Routed
IPv4 Addresses		 # of Spammed Content
or Spambot Hosts ▼		 Spam Score
1 Cloudflare, Inc. 13335 2,591,488 131,458 507.3
2 CTG Server Limited 152194 1,006,848 125,438 1,245.9
3 Dimension Network & Communication Limited 59371 62,464 104,922 16,797.2
4 SEDO GmbH 47846 1,024 91,326 891,855.5
5 Amazon.com, Inc. 16509 49,383,424 84,235 17.1
6 Alibaba (US) Technology Co., Ltd. 45102 6,036,224 68,794 114.0
7 CNSERVERS LLC 40065 1,355,264 65,099 480.3
8 Microsoft Corporation 8075 66,618,112 61,290 9.2
9 Cloudflare London, LLC 209242 126,976 56,282 4,432.5
10 HENGDA NETWORK LIMITED 138415 262,656 42,967 1,635.9
11 OVH SAS 16276 4,472,320 41,452 92.7
12 Clayer Limited 137951 813,312 34,493 424.1
13 Google LLC 15169 11,806,720 31,256 26.5
14 Shenzhen Tencent Computer Systems Company Limited 132203 2,457,088 30,858 125.6
15 Google LLC 396982 38,900,736 28,654 7.4
16 POWER LINE (HK) CO., LIMITED 132839 1,045,504 24,297 232.4
17 Team Internet AG 206834 1,024 22,030 215,136.7
18 Hong Kong Communications International Co., Limited 140227 62,208 21,546 3,463.5
19 Netsec Limited 45753 167,936 21,085 1,255.5
20 Cloudie Limited 55933 200,192 20,340 1,016.0

To allow comparison of large and small Hosting Networks (ASNs), we also rank Hosting Networks based on a metric, hosting network spam score, which is calculated by dividing the number of spammed content or spambot hosts reported against an ASN by the number of routable IPv4 addresses allocated to that ASN.

Hosting (ASN) Spam Score = (number of spammed content or spambot hosts /IP Addresses in ASN) * 10,000

In the table below, we show the top 20 hosting operators based on spam score.

Ranking of Hosting Networks (ASNs) by Spam Attack Score (September to November 2024)

Hosting Networks (ASNs) with a minimum of 50,000 IPv4 addresses and 25 spam attacks

Rank AS Name AS number # Routed IPv4
Addresses		 # of Spammed Content
or Spambot Hosts		 Spam Score ▼
1 Dimension Network & Communication Limited 59371 62,464 104,922 16,797.2
2 Cloudflare London, LLC 209242 126,976 56,282 4,432.5
3 Hong Kong Communications International Co., Limited 140227 62,208 21,546 3,463.5
4 Antbox Networks Limited 138995 51,968 9,476 1,823.4
5 NetLab Global 979 53,760 9,552 1,776.8
6 HENGDA NETWORK LIMITED 138415 262,656 42,967 1,635.9
7 SonderCloud Limited 133199 64,512 10,312 1,598.5
8 Netsec Limited 45753 167,936 21,085 1,255.5
9 CTG Server Limited 152194 1,006,848 125,438 1,245.9
10 High Family Technology Co., Limited 142032 62,208 6,719 1,080.1
11 Cloudie Limited 55933 200,192 20,340 1,016.0
12 STARCLOUD GLOBAL PTE., LTD. 140224 193,024 13,398 694.1
13 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED 135377 170,493 9,688 568.2
14 PEG TECH INC 398478 117,504 6,134 522.0
15 Tcloudnet 399077 134,272 6,904 514.2
16 Namecheap, Inc. 22612 92,096 4,685 508.7
17 Cloudflare, Inc. 13335 2,591,488 131,458 507.3
18 CNSERVERS LLC 40065 1,355,264 65,099 480.3
19 PEG TECH INC 398823 244,736 11,647 475.9
20 Forewin Telecom Group Limited 38186 68,352 3,249 475.3

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