ASN lookup

Every Autonomous System we hold address data for, largest first. An AS number identifies the organisation that announces a route — usually a better answer to “who owns this IP?” than the city it maps to.

Showing the 250 largest of 5974.

Autonomous Systems ranked by IPv4 address count
AS numberOrganisationIPv4 addressesCountries
AS749United States Department of Defense (DoD)444.5M1
AS16509Amazon.com, Inc.314.8M51
AS4134Chinanet197.9M1
AS7018AT&T Enterprises, LLC179.9M2
AS8075Microsoft Corporation161.4M28
AS7922Comcast Cable Communications, LLC135.6M1
AS4837CHINA UNICOM China169 Backbone114.5M1
AS4766Korea Telecom92.8M1
AS701Verizon Business81.1M1
AS17676SoftBank Corp.76.6M1
AS3320Deutsche Telekom AG68.3M3
AS721United States Department of Defense (DoD)58.7M1
AS4713NTT DOCOMO BUSINESS,Inc.57.2M1
AS3356Level 3 Parent, LLC54.2M11
AS174Cogent Communications, LLC48.4M49
AS14618Amazon.com, Inc.43.1M1
AS3215Orange40.1M7
AS3269TIM39.7M1
AS396982Google LLC39.3M18
AS2516KDDI CORPORATION36.1M1
AS6167Verizon Business36.1M1
AS9808China Mobile Communications Group Co., Ltd.34.5M2
AS4538China Education and Research Network Center34.2M1
AS714Apple Inc.33.8M1
AS31399Mercedes-Benz Group AG33.6M1
AS15557Societe Francaise Du Radiotelephone - SFR SA31.6M2
AS209CenturyLink Communications, LLC31.3M1
AS9318SK Broadband Co Ltd29.1M1
AS2856British Telecommunications Limited27.6M1
AS8151UNINET27.1M1
AS1221Telstra Limited26.8M1
AS21928T-Mobile USA, Inc.26.2M1
AS3209Vodafone GmbH25.5M1
AS22773Cox Communications Inc.25.4M1
AS20115Charter Communications LLC25.2M1
AS22394Verizon Business24.7M1
AS3462Data Communication Business Group24.2M1
AS7377University of California, San Diego23.5M9
AS26599TELEFONICA BRASIL S.A21.6M1
AS5650Frontier Communications of America, Inc.21.2M1
AS3352Telefonica De Espana S.a.u.20.8M1
AS17858LG POWERCOMM20.6M1
AS7029Windstream Communications LLC20.6M2
AS28573Claro NXT Telecomunicacoes Ltda19.9M1
AS37963Hangzhou Alibaba Advertising Co.,Ltd.18.8M2
AS26615TIM S/A18.5M1
AS12389Rostelecom18.3M1
AS12322Free SAS17.6M1
AS2907Research Organization of Information and Systems, National Institute of Informatics17.5M1
AS5089Virgin Media17.0M1
AS7303Telecom Argentina S.A.16.7M3
AS6805Telefonica Germany16.7M1
AS3786LG DACOM Corporation16.1M1
AS56United States Department of Defense (DoD)16.0M1
AS4812China Telecom (Group)15.7M1
AS4808China Unicom Beijing Province Network15.6M1
AS680Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.15.3M1
AS45899VNPT Corp15.3M1
AS20940Akamai International B.V.15.3M23
AS8452IDDQD-AS15.2M1
AS10796Charter Communications Inc14.8M1
AS1267Wind Tre S.p.A.14.8M1
AS1136KPN B.V.14.5M1
AS1103SURF B.V.14.4M1
AS20001Charter Communications Inc14.3M1
AS9644SK Telecom14.3M1
AS5410Bouygues Telecom SA14.2M1
AS12479Orange Espagne SA14.0M1
AS786Jisc Services Limited13.8M1
AS577Bell Canada13.7M1
AS9121Turk Telekom13.6M1
AS33915Vodafone Libertel B.V.13.2M1
AS3301Telia Company AB13.1M1
AS2828Verizon Business12.9M1
AS1257Tele2 SWIPnet12.9M4
AS1540Headquarters, USAISC12.7M1
AS36992ETISALAT MISR12.6M1
AS3561CenturyLink Communications, LLC12.4M1
AS45090Shenzhen Tencent Computer Systems Company Limited12.3M1
AS9829National Internet Backbone12.3M1
AS5607Sky UK Limited12.2M2
AS6713Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM12.0M1
AS33363Charter Communications, Inc11.6M1
AS11427Charter Communications Inc11.6M1
AS702Verizon Business11.4M16
AS812Rogers Communications Canada Inc.11.3M1
AS30722Fastweb11.2M1
AS1659Taiwan Academic Network (TANet) Information Center11.1M1
AS5617Orange Polska Spolka Akcyjna11.0M1
AS17506ARTERIA Networks Corporation10.8M1
AS6327Shaw Communications10.6M1
AS4804Microplex PTY LTD10.5M1
AS3292TDC Holding A/S10.4M1
AS4230CLARO S.A.10.3M1
AS7552Viettel Group10.0M1
AS6128Cablevision Systems Corp.9.7M1
AS9824JCOM Co., Ltd.9.5M1
AS852TELUS Communications Inc.9.5M1
AS27699TELEFONICA BRASIL S.A9.3M1
AS18881TELEFONICA BRASIL S.A9.1M1
AS2914NTT America, Inc.9.1M14
AS37069The Egyptian Company for Mobile Services (Mobinil)9.0M1
AS306United States Department of Defense (DoD)9.0M1
AS26611COMUNICACION CELULAR S.A. COMCEL S.A.8.9M1
AS6079RCN8.9M1
AS6389AT&T Enterprises, LLC8.9M1
AS25019Saudi Telecom Company JSC8.9M1
AS3549Level 3 Parent, LLC8.8M13
AS11426Charter Communications Inc8.8M1
AS11351Charter Communications Inc8.6M1
AS36947Telecom Algeria8.6M1
AS7713PT Telekomunikasi Indonesia8.5M1
AS45102Alibaba (US) Technology Co., Ltd.8.5M13
AS2119Telenor Norge AS8.5M1
AS55836Reliance Jio Infocomm Limited8.5M1
AS13489UNE EPM TELECOMUNICACIONES S.A.8.4M1
AS11003The Procter and Gamble Company8.2M1
AS3257GTT Communications Inc.8.2M10
AS22927Telefonica de Argentina8.0M1
AS16276OVH SAS8.0M12
AS13285TalkTalk7.9M1
AS20057AT&T Enterprises, LLC7.9M1
AS2497Internet Initiative Japan Inc.7.9M1
AS5432Proximus NV7.8M1
AS2527Sony Network Communications Inc.7.7M1
AS4249Eli Lilly and Company7.7M3
AS17557Pakistan Telecommunication Company Limited7.4M1
AS719Elisa Oyj7.3M1
AS2518BIGLOBE Inc.7.3M1
AS12430Vodafone Spain7.3M1
AS56046China Mobile communications corporation7.3M1
AS12874Fastweb7.1M1
AS3303Bluewin7.0M1
AS45609Bharti Airtel Ltd. AS for GPRS Service6.9M1
AS4847China Networks Inter-Exchange6.9M1
AS1759Telia Finland Oyj6.7M1
AS36351IBM Cloud6.6M3
AS4788TM TECHNOLOGY SERVICES SDN. BHD.6.5M1
AS58224Iran Telecommunication Company PJS6.4M1
AS24940Hetzner Online GmbH6.3M2
AS4155USDA6.3M1
AS3816COLOMBIA TELECOMUNICACIONES S.A. ESP BIC6.2M1
AS31898Oracle Corporation6.2M27
AS7545TPG Telecom Limited6.1M1
AS19901Brightspeed6.1M1
AS17511OPTAGE Inc.6.0M1
AS56041China Mobile communications corporation6.0M1
AS9299Philippine Long Distance Telephone Company5.9M1
AS12271Charter Communications Inc5.7M1
AS19108Optimum5.7M1
AS5769Videotron Ltee5.7M1
AS1761General Services Commission5.5M1
AS137Consortium GARR5.5M1
AS8447Telekom Austria5.5M1
AS35819Etihad Etisalat, a joint stock company5.4M1
AS17816China Unicom IP network China169 Guangdong province5.3M1
AS8434Telenor Sverige AB5.3M1
AS3741Dimension Data5.2M1
AS668United States Department of Defense (DoD)5.1M1
AS9605NTT DOCOMO, INC.5.1M1
AS5378Vodafone Limited5.1M1
AS8048CANTV Servicios, Venezuela5.0M1
AS2200Renater5.0M1
AS16637MTN SA4.9M1
AS37693OOREDOO TUNISIE SA4.9M1
AS8167V tal4.9M1
AS7418TELEFONICA CHILE S.A.4.8M1
AS36903Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM4.8M1
AS36925MEDITELECOM4.8M1
AS24560Bharti Airtel Ltd., Telemedia Services4.8M1
AS16625Akamai Technologies, Inc.4.8M34
AS11404Wave Broadband4.8M1
AS5384Emirates Telecommunications Group Company (etisalat Group) Pjsc4.8M1
AS9158Telenor A/S4.6M1
AS6848Telenet BV4.6M1
AS197207Mobile Communication Company of Iran PLC4.6M1
AS559SWITCH4.4M1
AS6057Administracion Nacional de Telecomunicaciones4.3M1
AS12400Partner Communications Ltd.4.3M1
AS553Universitaet Stuttgart4.2M1
AS6871British Telecommunications Limited4.2M1
AS9498BHARTI Airtel Ltd.4.2M1
AS2514NTT PC Communications, Inc.4.2M1
AS6730Sunrise GmbH4.0M1
AS56045China Mobile communications corporation3.9M1
AS6799OTEnet S.A.3.9M1
AS13999Mega Cable, S.A. de C.V.3.9M1
AS10013FreeBit Co.,Ltd.3.9M1
AS37492Orange Tunisie3.9M1
AS24445Henan Mobile Communications Co.,Ltd3.9M1
AS4725SoftBank Corp.3.8M1
AS1101SURF B.V.3.8M1
AS16086DNA Oyj3.8M1
AS24444Shandong Mobile Communication Company Limited3.7M1
AS1213Asiera Technology Services Clg3.7M1
AS9304HGC Global Communications Limited3.7M4
AS3243Servicos De Comunicacoes E Multimedia S.A.3.7M1
AS9674Far EastTone Telecommunication Co., Ltd.3.7M1
AS4760HKT Limited3.6M1
AS10620Telmex Colombia S.A.3.6M1
AS50266Odido Netherlands B.V.3.6M1
AS2116Globalconnect As3.6M1
AS6739Vodafone Ono, S.A.3.6M1
AS88811&1 Versatel GmbH3.6M1
AS24835Vodafone Data3.6M1
AS8708Digi Romania S.A.3.6M1
AS16232TIM3.6M1
AS8402PVimpelCom3.5M1
AS2860Nos Comunicacoes, S.A.3.5M1
AS33771Safaricom Limited3.5M1
AS29975Vodacom3.5M1
AS37168Cell C (Pty) Ltd3.4M1
AS1273IDDQD-AS3.4M3
AS36935Vodafone Data3.4M1
AS16135Turkcell Iletisim Hizmetleri A.s.3.4M1
AS6306TELEFONICA VENEZOLANA, C.A.3.4M1
AS4755TATA Communications formerly VSNL is Leading ISP3.3M2
AS10429TELEFONICA BRASIL S.A3.3M1
AS23724IDC, China Telecommunications Corporation3.3M1
AS17421Mobile Business Group3.3M1
AS25400Telia Norge AS3.3M1
AS4780Digital United Inc.3.2M1
AS9141Play3.2M1
AS55990Huawei Cloud Service data center3.2M1
AS5483Magyar Telekom Plc.3.2M1
AS24863Link Egypt (Link.NET)3.2M1
AS23693PT. Telekomunikasi Selular3.2M1
AS22085Claro S/A3.2M1
AS37457Telkom SA Ltd.3.2M1
AS1680Cellcom Fixed Line Communication L.P3.1M1
AS22047VTR BANDA ANCHA S.A.3.1M1
AS8412T-Mobile Austria GmbH3.1M1
AS5610O2 Czech Republic, a.s.3.1M1
AS6147INTEGRATEL PERU S.A.A.3.0M1
AS8359MTS PJSC3.0M1
AS34984Superonline Iletisim Hizmetleri A.S.3.0M1
AS9595NTT-ME Corporation3.0M1
AS9924Taiwan Fixed Network, Telco and Network Service Provider.3.0M1
AS18126Chubu Telecommunications Company, Inc.3.0M1
AS10010TOKAI Communications Corporation3.0M1
AS9269Hong Kong Broadband Network Ltd.3.0M1
AS2510FUJITSU LIMITED3.0M1
AS132203Tencent Building, Kejizhongyi Avenue3.0M8
AS9198JSC Kazakhtelecom3.0M1
AS11830Instituto Costarricense de Electricidad y Telecom.2.9M1
AS9050Orange Romania S.A.2.9M1
AS2519ARTERIA Networks Corporation2.9M1
AS36926Airtel Networks Kenya Limited2.8M2
AS18403FPT Telecom Company2.8M1
AS327934SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)2.8M1