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
501 Expereo International BV GLEIF verified 744
502 Buckeye Cablevision, Inc. 743
503 Timeweb, LLP 742
504 Radiant Communications Ltd NIXI 742
505 Arisk Communications inc. 740
506 iiNet Limited GLEIF verified 739
507 BIZFIVE 738
508 Colocation America Corporation 737
509 Hong Kong Communications International Co., Limited 736
510 FR-AXA-ASSURANCES--LB_INTERNET 735
511 Hulum Almustakbal Company for Communication Engineering and Services Ltd 734
512 Bharti Airtel Limited ORG-BAL1-AP 734
513 T-Mobile USA, Inc. GLEIF verified 726
514 DXC US Latin America Corporation 725
515 TurkTelekom 725
516 DT-MESCHEDE-NET 724
517 LEASEWEB 723
518 NATIONAL INFORMATION RESOURCES SERVICE 722
519 MTN NIGERIA Communication limited 722
520 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA 720
521 Reliance Communications Limited GLEIF verified 719
522 SI-T-2 717
523 BIZNET ISP 717
524 ASK4 Limited ORG-AL47-RIPE 716
525 "Domain names registrar REG.RU", Ltd 713
526 L99952 709
527 Podaon SIA 709
528 PT. Cyberindo Aditama 708
529 Netinternet Bilisim Teknolojileri AS 708
530 TM TECHNOLOGY SERVICES SDN BHD 707
531 PCCW Global (HK) Limited GLEIF verified 705
532 FASTWEB-POP-BACKUP-VOIP 705
533 GLOBAL CONNECTIVITY SOLUTIONS LLP 705
534 Africa on Cloud 702
535 UNIFIQUE TELECOMUNICACOES S/A 702
536 MILLICOM CABLE EL SALVADOR S.A. DE C.V. 701
537 FIRST SERVER LIMITED 701
538 Beget LLC 699
539 Binero AB GLEIF verified 699
540 Tata Teleservices (Maharashtra) Ltd GLEIF verified 698
541 L66972 698
542 PTML 698
543 SRE 697
544 ZZIC 697
545 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL GLEIF verified 695
546 Tata Play Broadband Private Limited GLEIF verified 695
547 HKBN Enterprise Solutions HK Limited 695
548 Owl Limited GLEIF verified 693
549 KOCNET-WAN 693
550 SysEleven GmbH 690
551 AROSSCLOUD INC. 688
552 Tele2 Sverige AB GLEIF verified 688
553 RailTel Corporation of India Ltd. GLEIF verified 687
554 FREE-SUDATEL 685
555 IPXO LLC 684
556 TWT-CUST-P-104000 683
557 Ziggo Services B.V. ZIGGO-CM 681
558 Telkom SA Ltd. GLEIF verified 681
559 TDS TELECOM 681
560 Energie AG Oberoesterreich Services und Digital Solutions GmbH ORG-EAOD1-RIPE 680
561 Telia Company AB GLEIF verified 678
562 Huawei Cloud Global 677
563 Psychz Networks 677
564 CTG Server Limited 676
565 a46597075 675
566 CETIN Ltd. Belgrade 675
567 CNIC-CAS 674
568 Norlys Fibernet GLEIF verified 672
569 Telefonica del Sur S.A. 671
570 FR-SUEZ--LB_INTERNET 671
571 Liberty Communications of Puerto Rico LLC GLEIF verified 669
572 PT iForte Global Internet 667
573 Omani Qatari Telecommunication Company SAOC 667
574 ADISTA-BACKBONE 666
575 PJSC "Vimpelcom" ORG-ES15-RIPE 666
576 DATAWEB-CUST-P2P 663
577 WS Telecom Inc 663
578 KDDI CORPORATION GLEIF verified 662
579 GROUP-IB-GLOBAL-PRIVATE-LIMITED GLEIF verified 661
580 DIGI SPAIN TELECOM S.A GLEIF verified 661
581 ETI-Net_1 660
582 NetLab Global 659
583 CDS Global Cloud Co., Ltd 659
584 TPx Communications 658
585 IDEALOGYSRL 656
586 Videotron Ltee GLEIF verified 655
587 Macquarie Technology Operations Pty Limited ORG-MCT1-AP 655
588 JSC "Ukrtelecom" GLEIF verified 655
589 Awaser Oman LLC 654
590 ComClark Network & Technology Corp 654
591 PPA 653
592 PLUTEX GmbH ORG-PG34-RIPE 653
593 ipcom GmbH GLEIF verified 652
594 Bytedance Inc. GLEIF verified 651
595 Krypt Technologies 650
596 Philippine Long Distance Telephone Co. GLEIF verified 649
597 CMPak Limited 646
598 Digital Core Technology Co Limited Digital_Core_Technology_Co_Limited 644
599 PCH AS42 643
600 AS2116-LINKNETS 642
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