The report below shows ASNs assigned to Japan, ranked by the total number of IP addresses currently active on each network. Click on the ASN for full IP address information, whois details and more. You can also view our hosting report to see the networks ranked by how many domain names they host.

ASN Name Num IPs
AS17676 Softbank BB Corp. 45,641,728
AS4713 NTT Communications Corporation 29,457,920
AS2516 KDDI CORPORATION 18,551,808
AS2907 Research Organization of Information and Systems, National Institute of Informatics 9,579,008
AS17506 UCOM Corp. 5,513,216
AS9824 Jupiter Telecommunication Co. Ltd 4,745,216
AS2497 Internet Initiative Japan Inc. 4,357,888
AS38895 Amazon.com Tech Telecom 4,076,288
AS2518 BIGLOBE Inc. 3,674,112
AS2510 FUJITSU LIMITED 3,372,800
AS2527 So-net Entertainment Corporation 3,275,776
AS17511 K-Opticom Corporation 3,198,976
AS4732 KDDI CORPORATION 2,689,024
AS9605 NTT DOCOMO, INC. 2,682,880
AS4716 KDDI CORPORATION 2,591,488
AS4725 SoftBank Mobile Corp. 2,451,456
AS10013 FreeBit Co.,Ltd. 2,065,664
AS2514 NTT PC Communications, Inc. 2,043,648
AS2519 ARTERIA Networks Corporation 1,827,840
AS9595 NTT-ME Corporation 1,644,800
AS37903 Ymobile Corporation 1,491,968
AS10010 TOKAI Communications Corporation 1,437,696
AS4694 Yahoo Japan Corporation 1,319,680
AS18126 Chubu Telecommunications Company, Inc. 1,307,648
AS9617 Jupiter Telecommunications Co., Ltd. 1,163,264
AS4685 Asahi Net 905,216
AS7679 QTnet,Inc. 697,600
AS4721 Jupiter Telecommunications Co., Ltd. 631,808
AS2500 WIDE Project 589,824
AS2915 AT&T Jens Corporation 507,392
AS7671 NTT SmartConnect Corporation 454,144
AS4682 SoftBank Mobile Corp. 451,328
AS9370 SAKURA Internet Inc. 433,408
AS7522 STNet, Incorporated 431,104
AS2506 NTT WEST CHUGOKU CORPORATION 415,744
AS9365 its communications Inc. 404,480
AS7509 Hokkaido University 360,448
AS18081 Kintetsu Cable Network Co., Ltd. 360,448
AS9371 SAKURA Internet Inc. 348,416
AS7684 SAKURA Internet Inc. 338,944
AS18127 Ibaraki Prefectural Government 332,288
AS131932 JR East Information Systems Company 327,680
AS4691 Dream Train Internet Inc. 319,744
AS4704 Rakuten Communications Corp. 303,104
AS7524 ITEC HANKYU HANSHIN CO.,LTD. 286,720
AS9597 KDDI Web Communications Inc. 276,736
AS9354 Community Network Center Inc. 270,848
AS4673 NTT DATA CORPORATION 262,144
AS7506 GMO Internet,Inc 248,576
AS10026 Pacnet Global Ltd 242,688
AS9609 Ymobile Corporation 233,472
AS2522 Japan Network Information Center 229,120
AS10021 KVH Co.,Ltd 227,584
AS7502 Advanced Software Technology & Management Research Institute of KYOTO 206,080
AS18144 Energia Communications,Inc. 204,800
AS24278 USEN CORPORATION 201,728
AS9619 Sony Global Solutions Inc. 200,704
AS2501 The University of Tokyo 200,704
AS23793 National Institute of Advanced Industrial Science and Technology 200,192
AS7514 Computer Engineering & Consulting, Ltd. 198,656
AS4729 Japan Atomic Energy Agency 196,608
AS7687 TOYOTA DIGITAL CRUISE.INCORPORATED 194,560
AS4686 BEKKOAME INTERNET INC. 187,648
AS4680 Mitsubishi Electric Information Network Corporation 181,760
AS2504 Kyoto University 179,968
AS17529 COMMUNITY NETWORK CENTER INC. 176,128
AS17941 Equinix Jpapan Enterprise K.K. 172,032
AS9374 EDION Corporation 165,888
AS37925 USEN CORPORATION 163,840
AS17698 COMMUNITY NETWORK CENTER INCORPORATED. 153,600
AS9351 ZTV CO.,LTD 151,552
AS7670 Energia Communications, Inc. 142,336
AS17707 AS for DATAHOTEL, which is one of iDC in Japan, 136,448
AS18077 Yamaguchi Cable Vision Co.,Ltd 135,680
AS23720 Rakuten Communications K.K. 133,632
AS18125 Ministry of Agriculture, Forestry and Fisheries Research Network 132,096
AS37917 University of Tsukuba 132,096
AS17687 National University Corporation Nagoya University 131,328
AS24297 Osaka Prefecture University 131,072
AS17516 NTT COMWARE CORPORATION 131,072
AS38635 Keio University 131,072
AS17943 Tokyo Denki University 131,072
AS24572 Yahoo Japan 119,808
AS7516 Tohoku Intelligent Telecommunication Co., Inc. 119,296
AS3488 Information Systems Department, Japan Aerospace Exploration Agency 115,200
AS2554 Yahoo Japan Corporation 107,520
AS45684 Kyocera Communication Systems Co., Ltd. 102,400
AS9614 Oita Cable Telecom Co,ltd. 100,352
AS59108 KATCH NETWORK INC. 98,304
AS9466 UUNET Japan Limited 97,024
AS4678 Canon IT Solutions Inc. 95,744
AS2512 TCP Inc. 92,416
AS9993 ITOCHU Techno-Solutions Corporation 91,136
AS4677 Marubeni OKI Network Solutions Inc. 90,112
AS24282 KAGOYA JAPAN Inc. 89,344
AS7682 HOKKAIDO TELECOMMUNICATIONS NETWORK Co., Inc. 89,088
AS18097 D.C.N. Corporation 88,576
AS9999 AT TOKYO Corporation 86,016
AS4688 Internet Initiative Japan Inc. 83,968
AS9600 So-net Corporation 82,944
AS18260 EHIME CATV CO.,LTD. 79,872
AS17514 Otsuka Corp. 79,872
AS10006 SECOM Trust Systems Co.,Ltd. 78,848
AS4675 UNIADEX, LTD. 76,032
AS23816 Yahoo Japan Corporation 75,776
AS2505 High Energy Accelerator Research Organization, KEK 74,496
AS58647 Kagawa University 73,728
AS23781 Toyama University 72,704
AS17534 NSK Co.,Ltd. 72,704
AS23820 Rakuten,Inc. 71,680
AS17509 STARNET Co.,Ltd. 71,680
AS9615 TOYOHASHI CABLE NETWORK INC. 71,680
AS17673 MITSUI KNOWLEDGE INDUSTRY CO., LTD. 71,680
AS37914 Advanced Software Technology and Management Research Institute of KYOTO 71,168
AS24276 Jupiter Telecommunications Co., Ltd. 69,632
AS18271 Sojitz Systems Corporation 69,632
AS18082 Japan Agency for Local Authority Information Systems 69,632
AS17947 SAKURA KCS Corporation. 69,632
AS10000 Nagasaki Cable Media Inc. 69,632
AS37918 Nippon Telegraph and Telephone Corporation 69,376
AS23791 LCV Corporation 68,608
AS55391 INTERNET MULTIFEED CO. 68,608
AS131921 GMO CLOUD K.K. 68,352
AS4730 Osaka University 67,584
AS2526 Unified IT Platform Office. IT Services Division. HITACHI,Ltd. 67,584
AS17961 mitene internet co., ltd. 67,584
AS38628 HIMEJI CABLE TELEVISION CORPORATION 66,560
AS24261 Mie University 66,304
AS2511 NTT 66,304
AS37920 Shiga University 66,048
AS17932 Japan Advanced Institute of Science and Technology 65,792
AS17944 Japan Weather Association 65,792
AS7531 GenomeNet Project 65,536
AS23615 University of Shizuoka 65,536
AS18286 Osaka City University 65,536
AS18276 Kansai University 65,536
AS55390 Tokyo University of Science 65,536
AS24268 National University Corporation Shizuoka University 65,536
AS10014 Nihon University 65,536
AS18268 Naganoken Kyodou Densan Co.Ltd. 65,536
AS24273 CANON INC. 65,536
AS24275 TOTO LTD. 65,536
AS18148 Fukuoka University 65,536
AS55380 Kanazawa University 65,536
AS55379 Hosei University 65,536
AS59104 Soka University 65,536
AS18128 RIKEN(Physical and Chemical Research Institute) 65,536
AS2508 Kyushu University 65,536
AS131930 Tokyo Broadcasting System Television, Inc. 65,536
AS17510 INFORMATION SERVICES INTERNATIONAL - DENTSU, LTD. 65,536
AS2513 Japan Science and Technology Agency 65,536
AS17512 Japan Airlines International Co., Ltd. 65,536
AS9355 National Institute of Information and Communications Technology 65,536
AS9357 NRI SecureTechnologies, Ltd. 65,536
AS131919 Meiji University 65,536
AS2523 JSPS 163rd Committee on Internet Technology 65,536
AS18124 Okayama University of Science 65,536
AS9366 SOLITON-NET 65,536
AS17523 Aoyama Gakuin University 65,536
AS55904 KOGAKUIN University 65,536
AS131897 National University Corporation ,Ehime University 65,536
AS18087 Toyo University 65,536
AS37895 Ryukoku University 65,536
AS131159 Yamagata University 65,536
AS9591 National Institute for Fusion Science 65,536
AS9593 Nikkei Inc. 65,536
AS37904 Softbank Mobile Corp. 65,536
AS18069 SOFTBANK TECHNOLOGY CORP. 65,536
AS37910 Chubu University 65,536
AS17960 University of the Ryukyus 65,536
AS9991 Hiroshima Shudo University 65,536
AS17956 WASEDA University 65,536
AS17949 Tokyo University of Technorogy 65,536
AS45673 Osaka Electro-Communication University 65,536
AS37919 SEGA Holdings Co., Ltd. 65,536
AS17946 Gifu University 65,536
AS17686 ACCELIA 65,536
AS38654 INES Corporation. 65,536
AS9367 Tokyo Institute of Technology 65,536
AS23807 Ritsumeikan University 65,536
AS9995 FirstServer, Inc. 65,536
AS23779 NTT Communications Corporation 65,536
AS24248 Wakayama University 65,536
AS24254 Kyoto Sangyo University 65,536
AS58652 Kochi University 65,536
AS58785 Tohoku Gakuin University 65,536
AS23623 Chuo University 65,536
AS38641 Osaka Sangyo University 65,536
AS17701 Seinan Gakuin University 65,536
AS7672 Hokuden Information System Service Co.,Ltd. 64,512
AS7511 SYNAPSE Co.,Ltd. 63,488
AS17939 miyazaki cabletelevision network Co.,LTD 59,392
AS4723 Dolphin 57,344
AS59127 Newmedia Corporation 55,296
AS9225 Telstra Global - KK 53,248
AS17675 Internap Japan Co.,LTD. 52,736
AS17505 SOFTBANK MOBILE Corp. 52,480
AS17530 Nihon Network Service Co, .Ltd. 51,200
AS9622 Kurashiki Cable TV 51,200
AS24296 Yahoo Japan Corporation 51,200
AS24295 Internap Japan Co.,Ltd. 50,176
AS131938 NISSAN MOTOR CO.,LTD. 49,152
AS37892 Cable Media WAIWAI Co.,Ltd. 49,152
AS4693 CSK-IT MANAGEMENT CORPORATION 49,152
AS55387 Japan Communication Inc. 49,152
AS18092 Kyushu Tele Communications Company 48,128
AS18278 Cable TV Corporation 47,104
AS18282 TONAMI Internet Service(TONAMI TransportationCo.,Ltd.) 46,592
AS38631 LINE Corporation 45,568
AS23637 Equinix Jpapan Enterprise K.K. 45,056
AS23785 SUN FIELD INTERNET LIMITED 45,056
AS9378 Jupiter Telecommunications Co., Ltd. 45,056
AS18136 Jupiter Telecommunications Co., Ltd. 43,008
AS7690 Mirai Communication Network Inc. 41,472
AS17945 iTV Co,Ltd 41,472
AS7676 TAM-Internet Service (T.A.M Co., Ltd.) 39,936
AS23790 Jupiter Telecommunications Co., Ltd. 38,912
AS18135 BTV Cable Television CO.,LTD. 38,912
AS9998 ISAO Corporation 36,864
AS38634 DWANGO Co.,Ltd. 36,864
AS10003 Ogaki Cable Television Co.,Inc. 36,864
AS10001 Mics Network Corporation 36,864
AS38462 Osaki Computer Engineering Co.Ltd 35,328
AS10019 Matsusaka Cable-TV Station Inc. 35,072
AS9607 BroadBand Tower, Inc. 34,816
AS17955 Densan Co., Ltd. 34,816
AS131915 Hamamatsu Cable Television .Inc 34,816
AS58793 NIFTY Corporation 33,024
AS59121 Asahi Kasei Networks Corporation 33,024
AS10015 Cyber Wave Japan Co., Ltd. 33,024
AS17691 NDS Co., Ltd. 32,768
AS18150 NetComBB Co.,Ltd. 32,768
AS17697 NTT PC Communications, Inc. 31,744
AS18068 Dream Wave Shizuoka Co. Ltd. 30,208
AS18134 Jupiter Telecommunications Co., Ltd. 29,696
AS59092 kronos.Co.,Ltd. 29,440
AS17524 DS Networks 29,184
AS7668 Hokuriku Telecommunication Network Co. 29,184
AS10012 Rakuten Communications Corp. 28,672
AS23629 Obihiro City Cable Co.,Ltd. 28,672
AS23783 Cable Networks Akita Co.,ltd. 28,416
AS17504 NRI Netcom, Ltd. 26,880
AS23624 Chukai Television Co,.Ltd. 26,624
AS131927 TV Matsumoto Cablevision 26,624
AS55394 GREE, Inc. 26,624
AS9601 Niigata Communication Service 25,600
AS24255 Tannan Cable Television Corporation 25,600
AS10004 JIN Office Service Inc. 25,088
AS24249 JWAY co., Ltd. 24,576
AS56291 Ace, Inc. 24,576
AS10002 IGAUENO CABLE TELEVISION CO.,LTD 24,576
AS9618 catv-tokushima 24,576
AS23661 CLARA ONLINE, Inc. 24,576
AS23788 Jupiter Telecommunications Co., Ltd. 24,576
AS17683 Wingtechnology Communications, Inc. 24,576
AS17950 SaiNet 24,576
AS132827 GATEWAY INC 24,576
AS18121 Ishikawa Computer Center Co.,LTD. 24,064
AS17682 296 BROAD NET Com Inc 23,552
AS23786 San-in Cable Vision CO.,LTD 22,528
AS131934 ICC Corporation 22,528
AS55900 GLBB Japan KK 21,760
AS135573 mediatti broadband communications 20,992
AS23777 NTT BUSINESS SOLUTIONS CORPORATION 20,992
AS18140 Yahoo Japan Corporation 20,736
AS131916 Tokyo Bay Network Co.,Ltd. 20,480
AS4197 Yahoo Japan Corporation 20,480
AS18267 Doshisha University 20,480
AS45675 Jupiter Telecommunications Co., Ltd. 20,480
AS131918 SHONAN CABLE NETWORK 20,480
AS17930 APNIC ASN block 20,480
AS4695 Energia Communications, Inc. 20,480
AS18283 Fureai Channel Inc. 19,456
AS18129 OKAYAMA NETWORK INC. 19,456
AS59109 Hitachi,Ltd., Cloud services Division 19,456
AS55392 INTERNET MULTIFEED CO. 19,456
AS17957 SOUTH TOKYO CABLETELEVISION 19,456
AS23784 SQUARE ENIX CO., LTD. 18,432
AS18274 Utsunomiya Cable TV Corporation 18,432
AS24277 Okinawa Cable Network Inc. 18,432
AS10011 advanscope.inc 18,432
AS9997 Suzuka Cable Co.,Ltd 17,920
AS23627 UEDA CABLE VISION CO.,LTD. 17,408
AS18094 Tokyo Cable Network.,INC 17,408
AS63770 Industrial Cyber Security Center of Excellence 17,408
AS17958 Kasaoka Cable Vision Co,LTD. 17,408
AS4711 INTEC Inc. 17,408
AS18071 Panasonic Corporation Corporate Information Systems Company 16,640
AS7503 Air Internet Service Co.,Ltd. 16,384
AS7523 RICOH JAPAN Corporation 16,384
AS23780 CTB Media Inc. 16,384
AS55910 Shibaura Institute of Technology 16,384
AS7513 Hitachi Systems, Ltd. 16,384
AS23635 CRCCMedia Co.,ltd 16,384
AS23625 TOKAI Communications Corporation 16,384
AS4709 NetLaputa Corporation 16,384
AS18085 Fujitsu Systems Applications & Support Limited 16,384
AS7505 Fujitsu Systems Applications & Support Limited 16,384
AS24271 Iruma CATV co. 16,384
AS55384 Japan Advanced Institute of Science and Technology 16,384
AS131899 DIG Inc. 15,616
AS59125 FAMILY NET JAPAN INCORPORATED 15,616
AS23778 IMIZU CABLE NETWORK CO.,LTD. 15,360
AS23805 Watarase Television Co.,Ltd 14,336
AS17936 Cable Television Kani Co.,Inc. 14,336
AS9604 FUJI SOFT INCORPORATED 14,336
AS24259 kanuma cable television Corporation 14,336
AS17931 Netforest,Inc. 14,336
AS23808 TOSHIMA CABLE NETWORK CO.,LTD 14,336
AS7677 Dai Nippon Printing Co., Ltd 13,568
AS24251 Iwakuni Cable Network Corporation 13,312
AS18070 Global Network Core Co.,Ltd. 13,312
AS18266 Datacore Works Co.,Ltd. 13,312
AS63997 Tsukaeru.net, Web Hosting Company, Japan 13,056
AS58650 Warabi Cable Vision Co., Ltd. 12,800
AS23632 TVT Tsuyama Co.,Ltd. 12,288
AS7519 APNIC ASN block 12,288
AS23817 Fujitsu Limited. 12,288
AS55388 ASJ INC. 12,288
AS18142 KISTEM Co., Ltd. 12,288
AS18075 Chupicom Hiroshima Corp. 12,288
AS18281 Tokoname New-TV Corporation 12,288
AS4733 APNIC ASN block 12,288
AS23628 Academic newtown Community Cable Service 12,288
AS23818 JETINTERNET Corporation 11,520
AS131925 FAMILY NET JAPAN INCORPORATED 11,264
AS38639 NTT Communications Corporation 11,264
AS17661 NHN Techorus Corp. 11,264
AS24284 CyberAgent, Inc. 11,008
AS131931 Aomori Cable TV Co., Ltd. 10,240
AS55381 CITY-CABLE SHUNAN Corporation 10,240
AS59107 Hachinohe Cable Television Co. 10,240
AS17696 Okinawa Telecommunication Network Co.,Inc 10,240
AS24281 APNIC ASN block 10,240
AS59126 NCT CO.,LTD. 10,240
AS131926 Cable Television Saiki Co. , Ltd. 10,240
AS55385 Digital Alliance Co.,Ltd. 10,240
AS17689 Hokuden Information Technology,Inc. 9,728
AS132418 1 Rue Royale FR 9,216
AS131911 HONJYO CABLE VISION CO., LTD. 9,216
AS24279 SENDAI CATV CO.,LTD. 9,216
AS37922 Cable TV Yamagata Co.,Ltd. 9,216
AS45677 Isahaya Cable Television Co.,Inc. 9,216
AS23775 Tamashima TV Inc. 9,216
AS9621 Okinawa Telecommunication Network Co.,Inc 9,216
AS7664 Sanyo Computer Corp.Inc 9,216
AS17678 Gunma Internet Co,.ltd 8,704
AS173 Electrical Communications Laboratories 8,704
AS37908 KIBI Cable Television Co.,Ltd. 8,704
AS132726 5-3 Miyuki-cho 8,704
AS18258 Morgan Stanley Japan Limited 8,448
AS7678 Prox System Design Inc. 8,192
AS17694 Deutsche Bank Group, Japan BGP connection 8,192
AS17940 CYBER LINKS Co.,Ltd. 8,192
AS17677 UCOM Corporation 8,192
AS17528 APNIC ASN block 8,192
AS17518 Shiojiri City 8,192
AS7521 INTERNET MULTIFEED CO. 8,192
AS59096 Meiji Gakuin University 8,192
AS59091 Kanagawa Institute of Technology 8,192
AS23618 Ibara Broadcasting Company 8,192
AS23619 SMARTVALUE Co.,Ltd. 8,192
AS7663 FUJIMIC INC. 8,192
AS23639 NTT Bizlink, Inc. 8,192
AS7665 Okayama Prefectural Government 8,192
AS23796 NTT Service Evolution Laboratories 8,192
AS23804 Nonprofit Organization Kitaura Hana Net 8,192
AS23810 IC-NET Corporation 8,192
AS55899 LEON TECHNOLOGY, Inc. 8,192
AS23967 Produce On Demand Inc. Streaming Contents Delivery Service Tokyo 8,192
AS7683 trunk inc. 8,192
AS7686 Technology Networks Inc. 8,192
AS24336 DIGITALBANK, Inc., Regional ISP in Japan 8,192
AS9352 KuMaGaYaNet 8,192
AS131933 TAMA Television Co., Ltd 8,192
AS9358 Kanden Information Systems Company,Incorporated 8,192
AS4719 Onkyo Corporation 8,192
AS4683 Phase One, Inc. 8,192
AS38043 Sophia Reserch Institute, Ltd. 8,192
AS4672 IBM Japan, Ltd. 8,192
AS23620 DooGA Co., Ltd. 7,680
AS17948 EditNet, Incorporated 7,168
AS18259 NTT Communications Corporation 7,168
AS18264 Seikei Eizo Network Inc. 7,168
AS23822 Hagi Cable Network Co., Ltd 7,168
AS17693 YAMATO SYSTEM DEVELOPMENT CO., LTD. 7,168
AS23829 NTT NEOMEIT YAMAGUCHI CORPORATION 6,912
AS7660 Asia Pacific Advanced Network - Japan 6,656
AS131893 RICOH Company, Ltd. 6,400
AS63772 extride inc. 6,400
AS38715 Regional-IX ASN Tottori pref Japan. 6,400
AS23631 Sofu System, Inc 6,144
AS24512 HAL Internet, Internet Service Provider, Tottori, Japan 6,144
AS7517 ICOMT Inc. 6,144
AS9353 MEDIAWARS co.,ltd. 6,144
AS24289 Kagawa T.V Broadcast Network Co,.Ltd 6,144
AS59094 esu2 Corporation 6,144
AS23613 New Media Tokushima Co.,ltd. 6,144
AS23641 NS Computer Service Corporation 6,144
AS131923 Mihara Cable Television Ltd. 6,144
AS17680 SCSK Corporation 6,144
AS23827 Azumino Network Community TV 6,144
AS24290 Heart Network Co.,LTD 6,144
AS23776 NEC Corporation 6,144
AS18088 Kyuden Infocom Company Inc 6,144
AS23809 Televi Naruto .CO.,LTD 6,144
AS136782 Kirin Networks 5,632
AS38638 Ip Core Corporation 5,376
AS2515 Japan Network Information Center 5,376
AS17937 NIKKEI ADVANCED SYSTEMS INC. 5,376
AS7529 NetIRD Inc. 5,376
AS18139 Hitachi Solutions, Ltd. 5,376
AS23614 Kochi Systems Co., Ltd. 5,120
AS45687 Minamikyusyu CableTV Net Inc. 5,120
AS135401 SAP 5,120
AS24270 CRC Solutions Corp., 5,120
AS17685 SQUARE ENIX CO., LTD. 5,120
AS37916 A.T.WORKS,Inc. 5,120
AS37907 DigiRock, Inc. 5,120
AS58788 Chiroro-Net Co.,Ltd. 5,120
AS38651 Mixi,Inc. 5,120
AS55376 KCV communications CO.,LTD. 5,120
AS23748 Cat Networks K.K. 4,864
AS37897 AXEL NETWORKS, INC. 4,608
AS55912 University of Kochi 4,352
AS18383 CAHI Corporation, 4,352
AS132095 HEWLETT PACKARD-SHINSUNA COLO 4,352
AS23803 The University of Tokyo 4,096
AS45690 Tokushima Central TV Co.,Inc. 4,096
AS23643 APNIC ASN block 4,096
AS23812 APNIC ASN block 4,096
AS23824 Future Spirits Co.,Ltd. 4,096
AS23836 RELATION Co., Ltd. 4,096
AS23926 JP DC 4,096
AS55889 Equinix Jpapan Enterprise K.K. 4,096
AS23621 APNIC ASN block 4,096
AS18290 Mimedia Corporation 4,096
AS38633 Value Core Inc. 4,096
AS24264 Kanazawa Institute of Technology 4,096
AS18289 AT&T JAPAN KK 4,096
AS7530 BroadBand Tower, Inc. 4,096
AS7685 APNIC ASN block 4,096
AS7527 Japan Internet Exchange Co., Ltd. 4,096
AS59102 GENES Co., Ltd. 4,096
AS18269 Kai Creates Inc. 4,096
AS18265 ZEXIS CORPORATION 4,096
AS18263 MEITETSUCOM Co., Ltd. 4,096
AS24293 FUJITSU SYSTEMS WEST LIMITED 4,096
AS132119 BNP Paribas 4,096
AS38652 Ginzado Co.,Ltd. 4,096
AS4785 xTom 4,096
AS10016 Minaminihon Information Processing Center Co Ltd 4,096
AS18146 Intec NetCore, Inc. 4,096
AS18143 Mitsubishi Research Institute DCS Co.,Ltd. 4,096
AS18141 HBA 4,096
AS18138 SAKURA Internet Inc. 4,096
AS17513 Kids-way Corporation 4,096
AS9363 FUJITSU KANSAI-CHUBU NET-TECH LIMITED 4,096
AS17521 Kochi University of Technology 4,096
AS17699 MEDiA K.K. 4,096
AS18090 IMS Corporation 4,096
AS18089 KDDI Corporation 4,096
AS18086 PFU LIMITED 4,096
AS18078 APNIC ASN block 4,096
AS37898 digitiminimi, inc. 4,096
AS18074 First Riding Technology Inc. 4,096
AS18072 NTT Communications, Corp. 4,096
AS18067 Humeia Corporation 4,096
AS17977 SINGTEL-JP 4,096
AS17953 BroadBand Security, Inc. 4,096
AS9990 Nippon Information and Communication Corporation 4,096
AS45672 Koga Cable TV Co., Ltd. 4,096
AS17934 National Institute of Information and Communications Technology 4,096
AS38080 Foresightwave INC. 4,096
AS17692 Kyocera Communication Systems Co., Ltd. 4,096
AS23792 APNIC ASN block 4,096
AS23794 Club iT Corporation 4,096
AS23795 Fitec Corp. 4,096
AS23773 EKZM co.,ltd. 4,096
AS23798 VR Techno Center,inc 4,096
AS23801 NTT Communications 4,096
AS59103 SoftEther Corporation 3,840
AS133027 ZenLogic Internet Ltd 3,840
AS24229 IX-layers, Inc. 3,584
AS137445 PF LINK SYSTEMS 3,584
AS45688 The University of Tokyo Interfaculty Initiative in Information Studies 3,584
AS38033 internet content provider 3,328
AS55902 TS-NET of TOSET, Inc. in Japan 3,328
AS45680 DOVA Corporation 3,328
AS58653 UD Trucks Corporation, Volvo Information Technology Japan 3,072
AS37915 Wakayama Prefectural Government 3,072
AS45846 Shiga area POP AS Number 3,072
AS23828 Misaki Town 3,072
AS58791 GMO Internet,Inc 3,072
AS59116 American International Group KK 3,072
AS18211 Nomura India Services Pvt Ltd 3,072
AS23616 Hitachi Information Systems, Ltd. 3,072
AS18151 COMPUTER ENGINEERING & CONSULTING LTD. 2,816
AS55569 Criteo APAC 2,560
AS136407 Virtustream Cloud Services Australia Pty Limited 2,560
AS59118 NRI SecureTechnologies, Ltd. 2,560
AS37891 JR TOKAI Information Systems Company 2,560
AS59117 RBNET Co.,Ltd. 2,560
AS24257 Japan Internet Exchange Co., Ltd. 2,560
AS23885 Oracle Corporation 2,560
AS38627 Baidu, Inc. 2,560
AS55898 Yahoo Japan Corporation 2,560
AS24121 Equinix Asia Pacific 2,304
AS45682 Excite Japan Co., Ltd. 2,304
AS37984 Chikushi Jogakuen University, Non-transit AS. 2,304
AS131936 UNIVERSAL MUSIC LLC 2,304
AS37900 NTT Communications Corporation 2,304
AS55393 Midokura Japan K.K. 2,048
AS131929 Yamanashi CATV Co,. ltd 2,048
AS131928 Tottori Teletopia Co., Ltd. 2,048
AS38632 cross-connect niigata co.,ltd. 2,048
AS23929 Ubiquitous Corp. Data Center Network. 2,048
AS38643 UNIADEX, LTD. 2,048
AS131907 Iwami Cablevision Co.,Ltd. 2,048
AS38642 Yoshizou XYZ Solutions 2,048
AS18080 Sopiafons Co.,Ltd 2,048
AS4707 APNIC ASN block 2,048
AS17532 Tokyo Polytechnic University 2,048
AS18076 Institute of Advanced Media Arts and Sciences 2,048
AS59129 LogicLinks, Inc. 2,048
AS59095 ACCELIA 2,048
AS18279 Bukkyo University 2,048
AS59101 mirai-bs corporation 2,048
AS24265 NTT Communications Corporation 2,048
AS24262 HAMANASU INFORMATION Co., Ltd. 2,048
AS18272 Benesse InfoShell Co.,Ltd 2,048
AS37909 Wakkanai Hokusei Gakuen University 2,048
AS55383 YYY Group, Inc. 2,048
AS37912 IPRIO Corporation. 2,048
AS24286 Weathernews,Inc. 2,048
AS24288 Accutechs Co., Ltd. 2,048
AS24292 NS Solutions Corporation 2,048
AS24253 J-Stream Inc. 2,048
AS23633 Niigata Communication Service 2,048
AS24250 Miyagin Computer Service Co.,ltd 2,048
AS58784 Rissho University 2,048
AS59123 Kakaku.com, Inc. 2,048
AS37889 J-PARC Center 1,792
AS23799 National Defense Academy 1,792
AS4697 NTT PF Labs 1,792
AS131914 datadockInc. 1,792
AS4710 NTT 1,536
AS136506 LEON CO.LTD 1,536
AS38636 DeNA, Co. Ltd. 1,536
AS133203 SBI BITS Co., Ltd. 1,536
AS132504 QUALITIA Co.,Ltd 1,536
AS24477 Network Appliance ASIAPAC 1,536
AS7667 KDDI R&D Laboratories, INC. 1,536
AS24280 Hitachi Systems, Ltd. 1,536
AS18123 INAOKI EDUCATIONAL INSTITUTION 1,536
AS134396 AusRegistry Anycast system 1,536
AS136574 Zheye Networks 1,280
AS23814 WIDE Project 1,280
AS23800 Fukui National College of Technology 1,280
AS7674 NTT Communications Corporation 1,280
AS131912 Cybozu,Inc. 1,280
AS58648 AT-I, Inc. 1,280
AS10209 Japan HUB and Data Center 1,280
AS38629 NTT Communications Corporation 1,280
AS131941 Entsu Co.,Ltd. 1,280
AS131904 Cyber Feel Inc. 1,280
AS55891 WATCH TOWER BIBLE AND TRACT SOCIETY 1,024
AS131160 Wire and Wireless Co.,Ltd. 1,024
AS131896 SSI Lab Inc. 1,024
AS131901 FIDESSA KK 1,024
AS131905 Japan Registry Services Co., Ltd. 1,024
AS131909 Okinawa Data Center 1,024
AS131910 SORACOM. INC. 1,024
AS131939 IPS INC 1,024
AS131942 Gurunavi, Inc. 1,024
AS133476 First Innovation K.K. 1,024
AS136178 FIL Japan Holdings K.K. 1,024
AS137912 Global Broadband K.K 1,024
AS138033 BBIX, Inc 1,024
AS18091 Teikyo University 1,024
AS18149 Japan Registry Service Co., Ltd. 1,024
AS23813 SORUN Corporation 1,024
AS23826 Daido University 1,024
AS23835 APNIC ASN block 1,024
AS23940 THOMSON FINANCIAL. Financial Content provider.Tokyo 1,024
AS24263 HONDA MOTOR Co., Ltd. 1,024
AS38648 F-REGI Co.,Ltd. 1,024
AS45676 SBI TradeWinTech Co.,Ltd. 1,024
AS4717 WIDE Project 1,024
AS4718 Cyber Kansai Project 1,024
AS4774 A-Bone by Internet Initiative Japan Inc. 1,024
AS54415 WIZ TECHNOLOGIES 1,024
AS55378 QUICK Corp. 1,024
AS55382 Nagato city office 1,024
AS55890 Suntory Business Expert Limited 1,024
AS55894 Who's Next 1,024
AS55896 Videx Inc. 1,024
AS58645 Miyagi Cable TV Co.,Ltd 1,024
AS58654 BLESS Co.,Ltd. 1,024
AS58789 DUNAMIS Co.,Ltd 1,024
AS58792 WirelessGate, Inc. 1,024
AS59093 IMABARI CATV CORPORATION 1,024
AS59097 Okinawa Cross Head Co., Ltd. 1,024
AS59099 BroadBand Tower, Inc. 1,024
AS59105 Home NOC Operators Group 1,024
AS59110 BPS Inc. 1,024
AS59112 Plus One marketing Ltd. 1,024
AS59122 Ranger-Systems Co., Ltd. 1,024
AS63771 Border Gateway Protocol Network Analysis Project 1,024
AS63774 Kamoike.net LLP 1,024
AS63776 Mercari, Inc. 1,024
AS7500 WIDE Project 1,024
AS206689 Beeks Financial Cloud Ltd 768
AS37893 TradeWeb Europe Limited 768
AS37888 HORIBA, Ltd. 768
AS137001 OSOA Co.,LTD. 768
AS24283 MIEDEN SYSTEM SOLUTION .LTD 768
AS136769 WingTecJapan G.K 768
AS55905 TOP CLOUD Inc. 768
AS137462 Rakuten Communications K.K. 512
AS55873 Shiodome City Center 15F 512
AS132451 2142-1;KUKIOKA;MAEDA; 512
AS131940 Nissho Electronics Corp. 512
AS55907 GMO Internet,Inc 512
AS7661 Network Organization for Research and Technologyin Hokkaido 512
AS45139 Microsoft Corp 512
AS131158 Nara Institute of Science and Technology, National University Corporation 512
AS38910 Transit AS Tokyo 512
AS37894 JPNIC-2Byte-ASBLOCK-AP 512
AS55895 N.S.Computer Service Co.,Ltd. 512
AS38658 LIQUIDNET ASIA LIMITED 512
AS136779 Schneider Electric Japan Ltd 512
AS17695 MLJS 512
AS55396 NRI SecureTechnologies, Ltd 512
AS45691 Elliott Advisors Asia Limited 512
AS131155 NTT Communications Corporation 512
AS63917 7-1, Udagawacho, 512
AS59120 Tsukuba Internet Service Corporation 512
AS24291 MITSUI & CO., LTD. 512
AS9935 AGNS Customer AS 512
AS10033 iBasis Tokyo ICO 512
AS131920 WirelessGate, Inc. 512
AS24260 Board of trusty: Kinjo-Gakuen 512
AS133782 Elsevier Ltd 512
AS24274 Actelion Pharmaceuticals Japan Ltd. 256
AS37902 Nomura Research Institute, Ltd. 256
AS55908 Nomura Research Institute,Ltd. 256
AS55909 Kochi National College of Technology 256
AS37923 NTT Communications Corporation 256
AS23787 APNIC ASN block 256
AS55949 Technopro Holdings 256
AS59111 Akita International University 256
AS137819 Beeks Financial Cloud (Japan) 256
AS59113 RICOH JAPAN Corporation 256
AS137008 1120 Shimokuzawa Chuo-ku Sagamihara-shi Kanagawa-ken 256
AS45217 Tora Trading Services Ltd. 256
AS45678 ABN AMRO Clearing Tokyo Co., Ltd. 256
AS4777 Asia Pacific Network Information Centre 256
AS136796 CORELINK JAPAN 256
AS59115 CYBERDYNE Inc. 256
AS135304 VMWare Incorporation 256
AS24258 APNIC ASN block 256
AS134827 EY Business Initiative Co., Ltd 256
AS24256 SOFTBANK Corp. 256
AS24252 Japan Registry Service Co., Ltd. 256
AS38637 APNIC ASN block 256
AS133900 Gilead Sciences, Inc. 256
AS37927 Nomura Researth Institute, Ltd. 256
AS37921 JPNIC-2Byte-ASBLOCK-AP 256
AS23774 Japan Registry Service Co., Ltd. 256
AS59124 KYOTO Prefectural Government 256
AS37906 NetIRD Inc. 256
AS55373 Foundation for Biomedical Research and Innovation 256
AS23761 Xpedite Systems 256
AS59128 Kyoto University Microcomputer Club 256
AS23642 OBIS 256
AS58649 GMO Internet,Inc 256
AS58651 GMO Internet,Inc 256
AS63773 Birdie Mobile Inc. 256
AS24047 Internet Systems Consortium, Inc. 256
AS37924 Ministry of Land, Infrastructure and Transport Kinki Regional Development Bureau 256
AS23634 WIDE Project 256
AS23833 Marusan Securities Co., LTD. 256
AS131924 Kansai Airports 256
AS58786 GMO Internet,Inc 256
AS131917 Toshiba I.S. corp 256
AS55377 Sadiatec Co., Ltd 256
AS131078 KDDI R&D Laboratories, INC. 256
AS131913 Niigata ken 256
AS131075 Nippon Telegraph and Telephone Corporation PF Labs., 256
AS131906 Gap Japan K.K. 256
AS131903 Nomura Research Institute,Ltd. 256
AS131080 SAKURA Internet Inc. 256
AS23830 Gaitame.com Co.,Ltd. 256
AS131895 Okinawa Institute of science and technology 256
AS18284 Isetan Data Center Co., Ltd. 256
AS131894 UNIADEX, LTD. 256
AS24287 National Institute of Informatics 256
AS37905 Brastel Co.,Ltd 256
AS10807 Hitachi Business International, Ltd. 0
AS10124 Amazon Data Services Japan KK 0
AS59100 Kochi Gakuen College 0
AS18277 Kurashiki University of Science and the Arts 0
AS18270 Toin University of Yokohama 0
AS18262 APNIC ASN block 0
AS18131 NTT Communications Corporation Innovative IP Architecture Center 0
AS9992 APNIC ASN block 0
AS59106 SKYLINKS INC. 0
AS18130 APNIC ASN block 0
AS18122 Advanced Software Technology & Management Research Institute of KYOTO 0
AS18096 APNIC ASN block 0
AS9994 APNIC ASN block 0
AS59114 Recruit Holdings Co.,Ltd. 0
AS18095 Reitaku University 0
AS18093 APNIC ASN block 0
AS18084 Pacnet JP 0
AS59119 HIDATAKAYAMA CABLE NETWORK INC. 0
AS17952 APNIC ASN block 0
AS10018 APNIC ASN block 0
AS17938 SOFTBANK TELECOM Corp. 0
AS17935 APNIC ASN block 0
AS17933 Nippon Telegraph and Telephone East Corporation 0
AS17795 Netvein.co.jp 0
AS17704 APNIC ASN block 0
AS59130 NTT Communications Corperation 0
AS63524 Equinix Asia Pacific 0
AS17700 APNIC ASN block 0
AS9996 KDDI Corporation 0
AS10017 APNIC ASN block 0
AS63775 YAKAGE CABLE TELEVISION 0
AS10007 SoftBank Mobile Corp. 0
AS63978 CJL-JP 0
AS17690 APNIC ASN block 0
AS7488 Yahoo Japan Corporation 0
AS10005 APNIC ASN block 0
AS7501 APNIC ASN block 0
AS17679 APNIC ASN block 0
AS17674 APNIC ASN block 0
AS17527 CHITA MEDIAS NETWORK INC. 0
AS17525 APNIC ASN block 0
AS7508 APNIC ASN block 0
AS17522 NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION 0
AS17520 APNIC ASN block 0
AS7512 WITH Network 0
AS17517 APNIC ASN block 0
AS138467 Yahagi Network Solutions 0
AS7515 NTT Communications Corporation 0
AS138384 Rakuten Mobile Network, Inc. 0
AS4681 Yahoo Japan Corporation 0
AS7518 APNIC ASN block 0
AS138190 Aurura Solutions LTD 0
AS7520 APNIC ASN block 0
AS138181 Hu's Tech LLC 0
AS138157 TP Networks, LLC 0
AS138038 Wolf Network Lab 0
AS138030 NET-NAVICE 0
AS7525 APNIC ASN block 0
AS7526 Mitsubishi Electric Information Network Corporation 0
AS137875 ShedDC 0
AS137407 EIC INC 0
AS7662 APNIC ASN block 0
AS7666 Mitsubishi Corporation 0
AS7669 DIGITAL TECHNOLOGIES CORPORATION 0
AS134606 Satori Networks 0
AS134532 ATT NBE Equinix Tokyo 0
AS7673 ejworks corporation 0
AS133869 SalesForce.com, Inc. 0
AS133795 Choopa, LLC 0
AS132906 EVM Networks 0
AS7680 APNIC ASN block 0
AS7681 APNIC ASN block 0
AS132888 Freak 0
AS132833 Research Management Ltd. 0
AS132592 Star Co,.Ltd. 0
AS132496 SBI BITS Co., Ltd. 0
AS132373 ASIAN-WEB-JP 0
AS7688 Nippon Internet Access Inc. 0
AS7689 APNIC ASN block 0
AS132211 FX Corporate LLC 0
AS7691 APNIC ASN block 0
AS9222 Intel Online Services Asia 0
AS132120 Internet Systems Consortium 0
AS9349 APNIC ASN block 0
AS9350 APNIC ASN block 0
AS132024 Rebyc Inc. 0
AS131937 Joetsu Cable Vision 0
AS131935 Kamoike.net LLP 0
AS9356 APNIC ASN block 0
AS9361 APNIC ASN block 0
AS9362 APNIC ASN block 0
AS9364 APNIC ASN block 0
AS131908 INTEC Inc. 0
AS9368 APNIC ASN block 0
AS9369 APNIC ASN block 0
AS131900 Directorz Co.,Ltd. 0
AS131898 Yahoo Japan Corporation 0
AS9373 APNIC ASN block 0
AS9376 SMARTVALUE Co.,Ltd. 0
AS9379 APNIC ASN block 0
AS9380 Community Network Center Inc. 0
AS131157 IMS Corporation 0
AS9592 SOFTBANK TELECOM Corp. 0
AS131154 NANO OPT Media, Inc. 0
AS131153 KVH Co., Ltd. 0
AS9598 NTT Communications Corporation 0
AS9599 EJWORKS CORPORATION 0
AS131152 BBIX,Inc. 0
AS131106 AS for DATAHOTEL, which is one of iDC in Japan, 0
AS9602 APNIC ASN block 0
AS9603 APNIC ASN block 0
AS131086 Densan Co., Ltd. 0
AS131085 Niigata Communication Service 0
AS9606 Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency 0
AS131084 MKI Network Solutions, Ltd. 0
AS9608 APNIC ASN block 0
AS45674 BIGLOBE Inc. 0
AS45436 Green Net Co., Ltd. 0
AS131082 Japan Internet Exchange Co., Ltd. 0
AS45679 Tatsumi, Tomo 0
AS4251 TWICS Co. Ltd. 0
AS45685 Rikkyo Gakuin Rikkyo University 0
AS45686 INTERNET MULTIFEED CO. 0
AS38655 SaiNet Corporation 0
AS45689 Convivial Net 0
AS38653 Japan Post Holdings Co., Ltd. 0
AS38649 APNIC ASN block 0
AS38645 NTT Communications Corporation 0
AS38644 INTERNET MULTIFEED CO. 0
AS4674 APNIC ASN block 0
AS38640 SAKURA Internet Inc. 0
AS4676 APNIC ASN block 0
AS38610 APNIC R&D Centre JP 0
AS138328 Skadden, Arps, Slate, Meagher & Flom LLP 0
AS37926 JPNIC-2Byte-ASBLOCK-AP 0
AS4684 NTT PC Communications, Inc. 0
AS37911 JPNIC-2Byte-ASBLOCK-AP 0
AS4689 APNIC ASN block 0
AS4690 WIDE Project 0
AS4692 InternetWare Co., LTD. 0
AS37901 NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION 0
AS4696 APNIC ASN block 0
AS37899 NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION 0
AS4698 InterLink Co., Ltd. 0
AS4699 APNIC ASN block 0
AS4700 Niji-Net Inc. 0
AS4701 APNIC ASN block 0
AS4705 APNIC ASN block 0
AS4706 APNIC ASN block 0
AS4708 Nippon Internet Access Inc. 0
AS3775 Global Network Solutions, IBM Japan, Ltd. 0
AS3510 Real World Computing Partnership 0
AS4712 JAPAN TOBACCO INC. 0
AS3391 ASCIInet Corporation 0
AS2713 AT&T Jens Corporation 0
AS9610 APNIC ASN block 0
AS9611 APNIC ASN block 0
AS2528 JPNIC-2Byte-ASBLOCK-AP 0
AS4720 APNIC ASN block 0
AS2525 JPNIC-2Byte-ASBLOCK-AP 0
AS4722 SoftBank Corp. 0
AS2524 EJWORKS CORPORATION 0
AS4724 APNIC ASN block 0
AS2521 Yahoo Japan Corporation 0
AS4727 KYODO PRINTING BUSINESS SOLUTIONS CO.,LTD 0
AS4728 APNIC ASN block 0
AS2517 JPNIC-2Byte-ASBLOCK-AP 0
AS2507 JPNIC-2Byte-ASBLOCK-AP 0
AS2502 The University of Tokyo 0
AS2499 Japan Network Information Center 0
AS9613 APNIC ASN block 0
AS2498 JPNIC-2Byte-ASBLOCK-AP 0
AS131081 Intec NetCore, Inc. 0
AS55372 University of the Ryukyus 0
AS55375 SmartInsight Inc. 0
AS24294 APNIC ASN block 0
AS24285 APNIC ASN block 0
AS9616 WIDE Project 0
AS24269 APNIC ASN block 0
AS24266 APNIC ASN block 0
AS55389 Japan Network Enabler Corporation 0
AS24114 Equinix Asia Pacific 0
AS24062 Kari Network Inc. 0
AS24056 Internet Data Centre 0
AS55748 7-9-10 Nishi-Shinjuku 0
AS55817 Nippon Telegraph and Telephone Corporation PF Labs 0
AS131079 INTERNET MULTIFEED CO. 0
AS55893 NTT DATA CORPORATION 0
AS55897 SAKURA Internet Inc. 0
AS23831 NISIOWARI CATV CORPORATION 0
AS23819 APNIC ASN block 0
AS55901 Sony Computer Entertainment Inc 0
AS23815 Japan Internet Exchange Co., Ltd. 0
AS55903 Tokyo Stock Exchange, Inc. 0
AS23806 Chupicom Hiroshima Corp. 0
AS55906 Ustream Asia, Inc. 0
AS23797 IXO 0
AS56021 NetResource corporation 0
AS56023 SmartRams Co., Ltd. 0
AS56024 Biz-front Inc 0
AS56025 AMY INC 0
AS56029 CELL INC. 0
AS56033 Rakushasu Inc 0
AS56218 QGPOP 0
AS58535 MarketPrizm BV 0
AS9620 APNIC ASN block 0
AS58646 FreeBit Co.,Ltd. 0
AS23640 BBIX,Inc. 0
AS23638 AMIXCOM Inc. 0
AS23636 APNIC ASN block 0
AS131074 APNIC R&D Centre JP 0
AS23630 CAC Inc. 0
AS23626 APNIC ASN block 0
AS131073 Pacnet Global Ltd. 0
AS23622 Tsuru Gakuen 0
AS1233 National Space Development Agency 0
AS23612 APNIC ASN block 0
AS18288 APNIC ASN block 0
AS18285 APNIC ASN block 0
AS18280 APNIC ASN block 0

Details

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

This page shows ASNs for Japan. See the global ASN report for network, IP address information and whois details for other countries.