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
401 DATAFORSEO-OU GLEIF verified 932
402 IDC, China Telecommunications Corporation 932
403 VSX Networks 929
404 FR-ADECCO--LB_INTERNET 927
405 Itility Limited ORG-IL332-RIPE 921
406 Yahoo Holdings Inc. 910
407 MILLICOM CABLE COSTA RICA S.A. GLEIF verified 909
408 Zayo Bandwidth GLEIF verified 909
409 Telium Telecomunicações Ltda 907
410 CLOUVIDER-HB-CLIENT-2404 905
411 COLT-JP 902
412 Silicon Sky Consulting 902
413 Net at Once Sweden AB ORG-NaOA1-RIPE 900
414 FR-AXA-FRANCE--LB_INTERNET 895
415 Mobile Communication Company of Iran PLC 893
416 MOBIFONE Corporation 889
417 Meta 888
418 velia.net Internetdienste GmbH 887
419 Cablemas Telecomunicaciones SA de CV GLEIF verified 883
420 Tikona Infinet Ltd. 882
421 TIWS-SMART-NETECONOMY 881
422 GLOBAL COMMUNICATION NETWORK LIMITED 877
423 Unitymedia-B2B-NET 875
424 Ote SA (Hellenic Telecommunications Organisation) GLEIF verified 872
425 SYNAPSIS COLOMBIA SAS 871
426 Hurricane Electric 868
427 BT-CUST-RESERVED-NET 868
428 TESNETWORK 865
429 Rackdog LLC 865
430 STICHTING_DUWO 864
431 FASTWEB-AMPLIFON_ITALIA 862
432 L99680 861
433 Telenor A/S ORG-SA20-RIPE 858
434 PE-CE_WAN 856
435 FR-POMPAC-DEVELOPPEMENT--LB_INTERNET 855
436 Pacific Internet Pte Ltd 854
437 Corporación Telemic C.A. 851
438 Telefonica de Argentina 849
439 PRIVATE JOINT STOCK COMPANY "DATAGROUP" 848
440 PAVLOV MEDIA INC GLEIF verified 843
441 Expereo International BV GLEIF verified 843
442 Tcloudnet, Inc 841
443 BUNNYWAY, informacijske storitve d.o.o. 840
444 Facebook, Inc. 838
445 Golden Telecom LLC 838
446 WideOpenWest Finance LLC GLEIF verified 835
447 Swisscom (Schweiz) AG GLEIF verified 832
448 BT-CORPORATE 828
449 JRB 826
450 B2 Net Solutions Inc. 826
451 EGIHosting 822
452 Iron Mountain Data Center 818
453 Florida Department of Management Services - Division of Telecommunications 818
454 ETB - Colombia 810
455 Cloud Innovation Ltd ORG-CIL1-AFRINIC 810
456 ATT-EIPAM 809
457 intercolo GmbH 808
458 Elisa Corporation GLEIF verified 808
459 Netia SA ORG-NTS2-RIPE 807
460 Xneelo (Pty) Ltd 806
461 CHINANET Guangdong province Shenzhen MAN network 803
462 TBC Corporation GLEIF verified 802
463 Axtel, S.A.B. de C.V. 801
464 WIND Telecom S.A. 800
465 1&1 Versatel GmbH GLEIF verified 797
466 Kcell JSC GLEIF verified 795
467 iiNet Limited GLEIF verified 794
468 Alliance Broadband Services Pvt. Ltd. 793
469 Leaseweb USA, Inc. 791
470 CANTV Servicios, Venezuela 789
471 NOS COMUNICACOES, S.A. ORG-TPS1-RIPE 787
472 Spark Ventures GLEIF verified 785
473 XS4ALL-CUST 781
474 LITE CLOUD INC GLEIF verified 777
475 JIANGSUGROUP 776
476 Airtel Networks Limited GLEIF verified 774
477 SkyWire (PTY) LTD GLEIF verified 773
478 Headquarters, USAISC 772
479 Africa on Cloud 772
480 xTom GmbH 770
481 PT Aplikanusa Lintasarta 768
482 Atria Convergence Technologies Pvt. Ltd., GLEIF verified 768
483 Pioneer Elabs Ltd. GLEIF verified 768
484 HOS-468873 767
485 MitaX Network 766
486 Mobile Telecom-Service LLP 765
487 COOP Sverige AB GLEIF verified 764
488 Baxet Group Inc. 763
489 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH ORG-NLTu1-RIPE 763
490 BYXC 761
491 Respina Networks & Beyond PJSC 760
492 PT XL Axiata Tbk GLEIF verified 759
493 Hughes Network Systems, LLC GLEIF verified 757
494 CENIC 752
495 BIZONEFIVE 751
496 HUAWEI INTERNATIONAL PTE. LTD. GLEIF verified 750
497 AEZA GROUP LLC GLEIF verified 749
498 Unitas Global 746
499 Lumen Technologies UK Limited ORG-LC4-RIPE 744
500 FR-AXA-ASSURANCES--LB_INTERNET 744
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