Top organizations by netblock count

The largest organisations in our index, ranked by number of registered netblocks. Last computed 2026-11-01.

This ranks individual registry-name clusters. Where one organisation holds space under several different names, browse organisation entities to see them grouped.

# Organisation Attribution Netblocks
1 Philippine Long Distance Telephone Co. ORG-PLDT1-AP 254,925
2 Orange Polska Spolka Akcyjna ORG-PT1-RIPE 212,982
3 British Telecommunications Limited ORG-BPIS1-RIPE +1 handle merged 168,284
4 Microsoft Corporation GLEIF verified 77,100
6 TDC Holding A/S ORG-TD1-RIPE 63,587
7 A1 Telekom Austria AG ORG-TAA1-RIPE 52,017
8 IPV6 CLOUD Ltd. 51,604
9 China Mobile Communications Corporation GLEIF verified 48,833
10 Virgin Media Limited GLEIF verified 37,655
11 SK-VNET 32,363
12 Amazon.com, Inc. GLEIF verified 31,982
13 Hetzner Online GmbH GLEIF verified 29,053
14 Superonline Iletisim Hizmetleri A.S. GLEIF verified 28,917
15 OVH SAS GLEIF verified 19,569
16 Bell Canada GLEIF verified 18,504
17 HYTRONNETWORKSERVICES 16,704
18 Convergence Group (Wireless) Networks Limited 14,918
19 WIND TRE S.P.A. ORG-WTS2-RIPE 14,807
20 Bharti Airtel Limited GLEIF verified 14,775
21 United States Department of Defense (DoD) 14,702
22 Orange S.A. ORG-FT2-RIPE 14,504
23 Uninet S.A. de C.V. 13,877
24 Charter Communications LLC GLEIF verified 13,790
25 Amazon Web Services, Inc. GLEIF verified 11,902
26 China Telecom GLEIF verified 11,284
27 Saudi Telecom Company JSC GLEIF verified 11,189
28 China Unicom 11,022
29 Fastweb SpA GLEIF verified 9,657
30 Orange Espagne SA GLEIF verified 9,274
31 FPT Telecom Company 8,763
66 Level 3 Parent, LLC +1 handle merged GLEIF verified 8,496
32 Viettel Group 8,468
33 M1 LIMITED GLEIF verified 8,466
34 Verizon Business GLEIF verified 8,375
35 Google LLC GLEIF verified 8,213
36 GGSN-3G-ISAT-ID 8,157
37 Cloudflare, Inc. GLEIF verified 7,886
38 NextServ LLC 7,749
39 Cox Communications Inc. GLEIF verified 7,501
40 TPG Internet Pty Ltd GLEIF verified 7,393
41 Akamai Technologies, Inc. GLEIF verified 7,138
42 TTNet A.S. GLEIF verified 6,940
43 Larus Limited GLEIF verified 6,853
44 Metro Fibre Networx (Pty) Ltd ORG-MN2-AFRINIC 6,829
45 Oracle Corporation GLEIF verified 6,582
46 ENTANET International Limited ORG-EA52-RIPE 6,215
47 YANDEX LLC GLEIF verified 6,060
48 TIMME-HOSTING-GMBH-UND-CO-KG 6,032
49 M247 Europe SRL 5,924
50 Cogent Communications, LLC GLEIF verified 5,661
51 Beltelecom LLC 5,645
52 PacketHub S.A. 5,588
53 Akamai International B.V. GLEIF verified 5,527
54 NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK 5,385
55 Threatoff 5,347
56 Hostinger International Limited GLEIF verified 5,342
57 Vodafone Idea Ltd. (VIL) GLEIF verified 5,297
58 China Education and Research Network Center 5,216
59 Datacamp Limited GLEIF verified 5,199
60 IT Hostline Ltd 5,189
61 GHOSTnet GmbH GLEIF verified 4,941
62 CABLE ONE, INC. GLEIF verified 4,912
63 FBONEZEROZERO 4,834
64 EE Limited ORG-TIUL1-RIPE 4,799
65 Paratus Telecommunications Limited 4,779
67 Shaw Communications GLEIF verified 4,777
68 SE-TELE2-CUST 4,774
69 PJSC Rostelecom 4,760
70 Telmex Colombia S.A. 4,735
71 Pulsant (Scotland) Ltd GLEIF verified 4,729
72 Claranet Limited ORG-CA48-RIPE 4,659
73 BR.Digital Telecom 4,591
74 AT&T Enterprises, LLC GLEIF verified 4,589
75 BYFLY-Mogilev-STATIC 4,567
76 ViaSat,Inc. GLEIF verified 4,501
77 Telekomunikasi Indonesia (PT) GLEIF verified 4,472
78 Comcast Cable Communications, LLC GLEIF verified 4,453
79 Getechbrothers, MB 4,351
80 NextHoldings Inc. 4,328
81 JSC "ER-Telecom Holding" 4,322
82 1&1 Versatel GmbH ORG-KG4-RIPE 4,298
83 Init7 (Switzerland) Ltd. 4,276
84 Fixed Mobile Telecommunications 4,160
85 Alestra, S. de R.L. de C.V. GLEIF verified 4,111
86 FITI-SLICE 4,096
87 The Constant Company, LLC GLEIF verified 4,083
88 PPPOE 4,078
89 BIZONEZERO 3,990
90 Mediacom Communications Corp 3,960
91 Vietnam Posts and Telecommunications (VNPT) 3,854
92 ETISALAT MISR 3,741
94 Windstream Communications LLC GLEIF verified 3,714
95 HostPapa 3,691
96 RCN Corporation GLEIF verified 3,645
97 Space Exploration Technologies Corporation GLEIF verified 3,531
98 LISHUI XUNWEI LTD HANGZHOU-XIAOSHAN 3,512
99 Wavenet Limited GLEIF verified 3,503
100 Headquarters, USAISC 3,503
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