Top organizations by netblock count

The largest organisations in our index, ranked by number of registered netblocks. Last computed 2026-07-06.

# Organisation Attribution Netblocks
501 JCOM Co., Ltd. GLEIF verified 742
502 BIZFIVE 741
503 Telecom Algeria 741
504 Bharti Airtel Limited ORG-BAL1-AP 734
505 OTRS-AG GLEIF verified 734
506 Netsec Limited 729
507 Buckeye Cablevision, Inc. 727
508 TurkTelekom 725
509 DT-MESCHEDE-NET 725
510 LEASEWEB 723
511 PEG TECH INC 720
512 Nebula Global LLC 719
513 Reliance Communications Limited GLEIF verified 718
514 Locaweb Serviços de Internet S/A 717
515 ASK4 Limited ORG-AL47-RIPE 716
516 SI-T-2 716
517 NATIONAL INFORMATION RESOURCES SERVICE 715
518 Eonix Corporation 714
519 Hulum Almustakbal Company for Communication Engineering and Services Ltd 713
520 LIBERTY NETWORKS HONDURAS, SOCIEDAD DE RESPONSABILIDAD LIMITADA 713
521 CONSULNETWORK LTDA 711
522 Vyve Broadband 710
523 PCCW IMS Limited GLEIF verified 709
524 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL GLEIF verified 708
525 KDDI CORPORATION GLEIF verified 707
526 Telecel S.A. GLEIF verified 707
527 Timeweb, LLP 706
528 FASTWEB-POP-BACKUP-VOIP 705
529 RITUALS-GTT 702
530 GLOBAL CONNECTIVITY SOLUTIONS LLP 701
531 PT. Cyberindo Aditama 701
532 SRE 700
533 Podaon SIA 700
534 TM TECHNOLOGY SERVICES SDN BHD 700
535 HOS-1815410 700
536 BT 700
537 CTG Server Limited 699
538 MTN NIGERIA Communication limited 699
539 L66972 698
540 L99952 698
541 ZZIC 697
542 PTML 697
543 KOCNET-WAN 693
544 NetActuate, Inc 692
545 Binero AB GLEIF verified 691
546 T-Mobile USA, Inc. GLEIF verified 689
547 Owl Limited GLEIF verified 688
548 Tata Teleservices (Maharashtra) Ltd GLEIF verified 686
549 Tele2 Sverige AB GLEIF verified 686
550 Arisk Communications inc. 686
551 PCCW Global (HK) Limited GLEIF verified 685
552 BIZNET ISP 685
553 FREE-SUDATEL 685
554 Norlys Fibernet GLEIF verified 684
555 TWT-CUST-P-104000 683
556 ACTION-SERVICE-DISTRIBUTIE-B-V-GTT 678
557 "Domain names registrar REG.RU", Ltd 678
558 Telia Company AB GLEIF verified 675
559 DIGI SPAIN TELECOM S.A GLEIF verified 674
560 Bytedance Inc. GLEIF verified 671
561 CNIC-CAS 668
562 Singapore Telecommunications Ltd, Magix Services 668
563 PJSC "Vimpelcom" ORG-ES15-RIPE 667
564 ADISTA-BACKBONE 667
565 Tata Play Broadband Private Limited GLEIF verified 666
566 Omani Qatari Telecommunication Company SAOC 665
567 SysEleven GmbH 665
568 Henet Telecomunicacoes Ltda 665
569 CETIN Ltd. Belgrade 664
570 PT iForte Global Internet 663
571 a46597075 663
572 DATAWEB-CUST-P2P 662
573 ETI-Net_1 660
574 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA 660
575 CDS Global Cloud Co., Ltd 659
576 Energie AG Oberoesterreich Services und Digital Solutions GmbH ORG-EAOD1-RIPE 657
577 PPA 656
578 MILLICOM CABLE EL SALVADOR S.A. DE C.V. 656
579 IDEALOGYSRL 655
580 Macquarie Technology Operations Pty Limited ORG-MCT1-AP 655
581 Hotwire Communications GLEIF verified 655
582 Beget LLC 654
583 Orion Network Limited 652
584 FR-SUEZ--LB_INTERNET 651
585 Unitary enterprise A1 650
586 AXESAT S.A 647
587 Krypt Technologies 646
588 MASTER S/A GLEIF verified 646
589 ipcom GmbH GLEIF verified 644
590 ECO-D1102721-NET 643
591 AS2116-LINKNETS 642
592 CMC Telecom Infrastructure Company 641
593 RailTel Corporation of India Ltd. GLEIF verified 641
594 Awaser Oman LLC 640
595 Taiwan Fixed Network, Telco and Network Service Provider. 639
596 Frogfoot Networks 639
597 FIRST SERVER LIMITED 636
598 Robinsons Bank Corporation GLEIF verified 635
599 PLUTEX GmbH ORG-PG34-RIPE 634
600 Telkom SA Ltd. GLEIF verified 634
← Previous Next →

Uses the REST API.