Top organizations by netblock count

The largest organisations in our index, ranked by number of registered netblocks. Last computed 2026-07-05.

# Organisation Attribution Netblocks
1 ORG-PLDT1-AP 238,985
2 ORG-PT1-RIPE 212,980
3 ORG-BPIS1-RIPE 93,909
4 ORG-BT4-RIPE 71,349
5 ORG-TD1-RIPE 63,114
6 Microsoft Corporation GLEIF verified 63,061
7 CLARO S.A. GLEIF verified 58,501
8 ORG-TAA1-RIPE 52,013
9 China Mobile Communications Corporation GLEIF verified 47,535
10 Virgin Media Limited GLEIF verified 37,384
11 SK-VNET 32,363
12 Hetzner Online GmbH GLEIF verified 29,008
13 Superonline Iletisim Hizmetleri A.S. GLEIF verified 27,407
14 Amazon.com, Inc. GLEIF verified 24,108
15 OVH SAS GLEIF verified 18,822
16 Bell Canada GLEIF verified 18,545
17 HYTRONNETWORKSERVICES 16,704
18 United States Department of Defense (DoD) 15,631
19 Convergence Group (Wireless) Networks Limited 14,918
20 Bharti Airtel Limited GLEIF verified 14,478
21 ORG-FT2-RIPE 14,464
22 Uninet LLC GLEIF verified 13,561
23 ORG-WTS2-RIPE 13,496
24 China Unicom 11,538
25 Amazon Web Services, Inc. GLEIF verified 10,766
26 Ligga Telecomunicações S.A. 10,552
27 Saudi Telecom Company JSC GLEIF verified 10,028
28 Fastweb SpA GLEIF verified 9,803
29 Telconet S.A 9,803
30 China Telecom GLEIF verified 9,693
31 Orange Espagne SA GLEIF verified 9,188
32 Charter Communications LLC GLEIF verified 9,187
33 TPG Internet Pty Ltd GLEIF verified 8,503
34 M1 LIMITED GLEIF verified 8,465
35 Viettel Group 8,436
36 Administracion Nacional de Telecomunicaciones 8,332
37 GGSN-3G-ISAT-ID 8,157
38 FPT Telecom Company 8,104
39 Akamai Technologies, Inc. GLEIF verified 8,030
40 GitHub, Inc. GLEIF verified 7,734
41 NextServ LLC 7,718
42 Google LLC GLEIF verified 7,585
43 TechCom s.r.o. 7,225
44 Cox Communications Inc. GLEIF verified 7,017
45 TTNet A.S. GLEIF verified 6,928
46 Verizon Business GLEIF verified 6,911
47 Cloudflare, Inc. GLEIF verified 6,847
48 INTEGRATEL PERÚ S.A.A. 6,433
49 ORG-CHL10-RIPE 6,215
50 Oracle Corporation GLEIF verified 6,169
51 TIMME-HOSTING-GMBH-UND-CO-KG 6,053
52 Cable Onda GLEIF verified 5,859
53 Vodafone Idea Ltd. (VIL) GLEIF verified 5,849
54 Beltelecom LLC 5,645
55 M247 Europe SRL 5,625
56 IT Hostline Ltd 5,570
57 Akamai International B.V. GLEIF verified 5,401
58 COTAS LTDA. 5,378
59 YANDEX LLC GLEIF verified 5,326
60 China Education and Research Network Center 5,139
61 NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK 5,002
62 Datacamp Limited GLEIF verified 4,982
63 FBONEZEROZERO 4,874
64 Paratus Telecommunications Limited 4,802
65 Level 3 Parent, LLC GLEIF verified 4,794
66 Cogent Communications, LLC GLEIF verified 4,776
67 PacketHub S.A. 4,742
68 Pulsant (Scotland) Ltd GLEIF verified 4,722
69 ORG-TIUL1-RIPE 4,720
70 CABLE ONE, INC. GLEIF verified 4,674
71 ORG-CA48-RIPE 4,659
72 PJSC Rostelecom 4,658
73 Telmex Colombia S.A. 4,638
74 CORPORACION NACIONAL DE TELECOMUNICACIONES - CNT EP 4,593
75 Shaw Communications GLEIF verified 4,585
76 BYFLY-Mogilev-STATIC 4,567
77 SE-TELE2-CUST 4,462
78 Telekomunikasi Indonesia (PT) GLEIF verified 4,367
79 AT&T Enterprises, LLC GLEIF verified 4,305
80 ORG-KG4-RIPE 4,295
81 ON EMPRESAS S.A.C. 4,244
82 Fixed Mobile Telecommunications 4,165
83 Viasat Mexico 4,109
84 FITI-SLICE 4,096
85 PPPOE 4,079
86 JSC "ER-Telecom Holding" 4,059
87 Comcast Cable Communications, LLC GLEIF verified 4,058
88 BIZONEZERO 4,015
89 Vietnam Posts and Telecommunications (VNPT) 3,818
90 Mediacom Communications Corp GLEIF verified 3,818
91 Larus Limited GLEIF verified 3,809
92 Alestra, S. de R.L. de C.V. GLEIF verified 3,768
93 FR-CARREFOUR-SYSTEMES-D-INFORMATION--LB_INTERNET 3,655
94 HostRoyale Technologies Pvt Ltd 3,614
95 ETISALAT MISR 3,534
96 CTC. CORP S.A. (TELEFONICA EMPRESAS) GLEIF verified 3,526
97 GINERNET S.L. 3,523
98 HANGZHOU-XIAOSHAN 3,514
99 Threatoff 3,502
100 Virtual Systems LLC 3,455
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