Home / ASN Lookup
ASN lookup
Find out who announces an IP address or range. Search by AS number, by IPv4 or IPv6 address, or by network name: the answer comes from the public global routing table, refreshed daily.
An AS number says who announces an address, not whether that address is risky. Maskbreak deliberately keeps routing data out of its risk score — see any AS page for why. New to AS numbers? What an ASN is, and how to find the ASN of an IP address.
ASN Directory: the largest networks
Every autonomous system that announces significant IPv4 space or sells infrastructure — 6,183 of them. Showing the 500 largest by announced address space.
AS749
DNIC-AS-00749
222.1M addresses · 1,878 ranges · US
AS16509
AMAZON-02
157.4M addresses · 4,545 ranges · US
AS4134
CHINANET-BACKBONE No.31,Jin-rong Street
99.1M addresses · 3,460 ranges · CN
AS7018
ATT-INTERNET4
90M addresses · 1,992 ranges · US
AS8075
MICROSOFT-CORP-MSN-AS-BLOCK
80.7M addresses · 924 ranges · US
AS4837
CHINA169-BACKBONE CHINA UNICOM China169 Backbone
57.2M addresses · 1,094 ranges · CN
AS4766
KIXS-AS-KR Korea Telecom
46.4M addresses · 1,836 ranges · KR
AS7922
COMCAST-7922
42.1M addresses · 1,528 ranges · US
AS701
UUNET
40.6M addresses · 1,367 ranges · US
AS17676
GIGAINFRA SoftBank Corp.
38.4M addresses · 101 ranges · JP
AS3320
DTAG Internet service provider operations
34.2M addresses · 702 ranges · DE
AS721
DNIC-ASBLK-00721-00726
29.7M addresses · 2,298 ranges · US
AS4713
OCN NTT Communications Corporation
28.6M addresses · 121 ranges · JP
AS3356
LEVEL3
27.4M addresses · 2,026 ranges · US
AS174
COGENT-174
24.6M addresses · 5,238 ranges · US
AS396982
GOOGLE-CLOUD-PLATFORM
22M addresses · 558 ranges · US
AS14618
AMAZON-AES
21.6M addresses · 1,000 ranges · US
AS3215
France Telecom - Orange
20.1M addresses · 252 ranges · FR
AS3269
ASN-IBSNAZ
19.8M addresses · 133 ranges · IT
AS2516
KDDI KDDI CORPORATION
18.1M addresses · 288 ranges · JP
AS6167
CELLCO-PART
18M addresses · 234 ranges · US
AS9808
CHINAMOBILE-CN China Mobile Communications Group Co., Ltd.
17.3M addresses · 2,769 ranges · CN
AS714
APPLE-ENGINEERING
16.9M addresses · 384 ranges · US
AS31399
DAIMLER-AS ITTTN Global Network
16.8M addresses · 8 ranges · DE
AS4538
ERX-CERNET-BKB China Education and Research Network Center
16.4M addresses · 879 ranges · CN
AS15557
LDCOMNET --- I3Dnet ---
15.8M addresses · 123 ranges · FR
AS209
CENTURYLINK-US-LEGACY-QWEST
15.7M addresses · 1,812 ranges · US
AS9318
SKB-AS SK Broadband Co Ltd
15M addresses · 808 ranges · KR
AS2856
BT-UK-AS BTnet UK Regional network
13.9M addresses · 423 ranges · GB
AS8151
UNINET
13.5M addresses · 837 ranges · MX
AS1221
ASN-TELSTRA Telstra Limited
13.4M addresses · 192 ranges · AU
AS21928
T-MOBILE-AS21928
13.1M addresses · 53 ranges · US
AS22773
ASN-CXA-ALL-CCI-22773-RDC
12.8M addresses · 1,177 ranges · US
AS3209
VODANET International IP-Backbone of Vodafone
12.8M addresses · 168 ranges · DE
AS20115
CHARTER-20115
12.4M addresses · 500 ranges · US
AS22394
CELLCO
12.3M addresses · 254 ranges · US
AS3462
HINET Data Communication Business Group
12.2M addresses · 79 ranges · TW
AS7377
UCSD
12.1M addresses · 250 ranges · US
AS26599
TELEFONICA BRASIL S.A
10.8M addresses · 170 ranges · BR
AS5650
FRONTIER-FRTR
10.7M addresses · 739 ranges · US
AS7029
WINDSTREAM
10.4M addresses · 1,122 ranges · US
AS3352
TELEFONICA_DE_ESPANA
10.4M addresses · 134 ranges · ES
AS17858
POWERVIS-AS-KR LG POWERCOMM
10.3M addresses · 52 ranges · KR
AS28573
Claro NXT Telecomunicacoes Ltda
10M addresses · 197 ranges · BR
AS37963
ALIBABA-CN-NET Hangzhou Alibaba Advertising Co.,Ltd.
9.4M addresses · 124 ranges · CN
AS26615
TIM SA
9.3M addresses · 243 ranges · BR
AS12389
ROSTELECOM-AS PJSC Rostelecom. Technical Team
9.2M addresses · 1,068 ranges · RU
AS12322
PROXAD
8.8M addresses · 16 ranges · FR
AS2907
SINET-AS Research Organization of Information and Systems, National Institute of Informatics
8.8M addresses · 411 ranges · JP
AS5089
NTL
8.5M addresses · 87 ranges · GB
AS7303
Telecom Argentina S.A.
8.4M addresses · 147 ranges · AR
AS6805
TDDE-ASN1
8.4M addresses · 33 ranges · DE
AS20940
AKAMAI-ASN1
8.2M addresses · 2,336 ranges · NL
AS3786
LGDACOM LG DACOM Corporation
8.1M addresses · 964 ranges · KR
AS4812
CHINANET-SH-AP China Telecom Group
7.9M addresses · 338 ranges · CN
AS56
DNIC-AS-00056
7.8M addresses · 320 ranges · US
AS680
DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.
7.7M addresses · 244 ranges · DE
AS45899
VNPT-AS-VN VNPT Corp
7.6M addresses · 398 ranges · VN
AS8452
TE-AS TE-AS
7.6M addresses · 219 ranges · EG
AS10796
TWC-10796-MIDWEST
7.4M addresses · 334 ranges · US
AS1267
ASN-WINDTRE IUNET
7.4M addresses · 51 ranges · IT
AS1136
KPN KPN National
7.3M addresses · 199 ranges · NL
AS20001
TWC-20001-PACWEST
7.2M addresses · 388 ranges · US
AS1103
SURFNET-NL SURFnet, The Netherlands
7.2M addresses · 72 ranges · NL
AS4808
CHINA169-BJ China Unicom Beijing Province Network
7.2M addresses · 404 ranges · CN
AS9644
SKTELECOM-NET-AS SK Telecom
7.1M addresses · 39 ranges · KR
AS5410
BOUYGTEL-ISP
7.1M addresses · 20 ranges · FR
AS12479
UNI2-AS
7M addresses · 1,112 ranges · ES
AS786
JANET Jisc Services Limited
6.9M addresses · 169 ranges · GB
AS1540
DNIC-ASBLK-01534-01546
6.9M addresses · 533 ranges · US
AS577
BACOM
6.9M addresses · 518 ranges · CA
AS9121
TTNET
6.7M addresses · 209 ranges · TR
AS33915
TNF-AS
6.6M addresses · 121 ranges · NL
AS2828
XO-AS15
6.5M addresses · 303 ranges · US
AS3301
TELIANET-SWEDEN Telia Company
6.5M addresses · 232 ranges · SE
AS1257
TELE2
6.5M addresses · 294 ranges · EU
AS3561
CENTURYLINK-LEGACY-SAVVIS
6.4M addresses · 602 ranges · US
AS36992
ETISALAT-MISR
6.3M addresses · 265 ranges · EG
AS45090
TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited
6.2M addresses · 103 ranges · CN
AS9829
BSNL-NIB National Internet Backbone
6.2M addresses · 164 ranges · IN
AS5607
BSKYB-BROADBAND-AS
6.1M addresses · 20 ranges · GB
AS6713
IAM-AS
6M addresses · 119 ranges · MA
AS33363
BHN-33363
5.8M addresses · 180 ranges · US
AS11427
TWC-11427-TEXAS
5.8M addresses · 301 ranges · US
AS812
ROGERS-COMMUNICATIONS
5.7M addresses · 364 ranges · CA
AS702
UUNET
5.7M addresses · 312 ranges · US
AS31898
ORACLE-BMC-31898
5.7M addresses · 768 ranges · US
AS30722
VODAFONE-IT-ASN
5.6M addresses · 75 ranges · IT
AS45102
ALIBABA-CN-NET Alibaba US Technology Co., Ltd.
5.6M addresses · 179 ranges · CN
AS1659
ERX-TANET-ASN1 Taiwan Academic Network TANet Information Center
5.5M addresses · 42 ranges · TW
AS5617
TPNET
5.5M addresses · 68 ranges · PL
AS17506
UCOM ARTERIA Networks Corporation
5.4M addresses · 26 ranges · JP
AS6327
SHAW
5.3M addresses · 176 ranges · CA
AS4804
MPX-AS Microplex PTY LTD
5.3M addresses · 50 ranges · AU
AS3292
TDC TDC AS
5.2M addresses · 111 ranges · DK
AS4230
CLARO S.A.
5.2M addresses · 32 ranges · BR
AS7552
VIETEL-AS-AP Viettel Group
5M addresses · 347 ranges · VN
AS2914
NTT-DATA-2914
4.9M addresses · 1,470 ranges · US
AS6128
CABLE-NET-1
4.9M addresses · 334 ranges · US
AS852
TELUS Communications
4.8M addresses · 528 ranges · CA
AS9824
JTCL-JP-AS JCOM Co., Ltd.
4.7M addresses · 20 ranges · JP
AS6079
RCN-AS
4.7M addresses · 1,264 ranges · US
AS16276
OVH
4.7M addresses · 613 ranges · FR
AS27699
TELEFONICA BRASIL S.A
4.6M addresses · 79 ranges · BR
AS18881
TELEFONICA BRASIL S.A
4.6M addresses · 170 ranges · BR
AS3549
LVLT-3549
4.5M addresses · 1,323 ranges · US
AS37069
MOBINIL
4.5M addresses · 11 ranges · EG
AS26611
COMUNICACION CELULAR S.A. COMCEL S.A.
4.5M addresses · 32 ranges · CO
AS6389
BELLSOUTH-NET-BLK
4.4M addresses · 170 ranges · US
AS306
DNIC-ASBLK-00306-00371
4.4M addresses · 144 ranges · US
AS25019
SAUDINETSTC-AS
4.4M addresses · 339 ranges · SA
AS11426
TWC-11426-CAROLINAS
4.4M addresses · 177 ranges · US
AS11351
TWC-11351-NORTHEAST
4.3M addresses · 110 ranges · US
AS36947
ALGTEL-AS
4.3M addresses · 34 ranges · DZ
AS7713
TELKOMNET-AS-AP PT Telekomunikasi Indonesia
4.3M addresses · 652 ranges · ID
AS2119
TELENOR-NEXTEL Telenor Norge AS
4.2M addresses · 85 ranges · NO
AS13489
UNE EPM TELECOMUNICACIONES S.A.
4.2M addresses · 54 ranges · CO
AS55836
RELIANCEJIO-IN Reliance Jio Infocomm Limited
4.2M addresses · 238 ranges · IN
AS16625
AKAMAI-AS
4.1M addresses · 1,072 ranges · US
AS2497
IIJ Internet Initiative Japan Inc.
4.1M addresses · 174 ranges · JP
AS11003
PANDG
4.1M addresses · 46 ranges · US
AS3257
GTT-BACKBONE GTT
4.1M addresses · 2,659 ranges · US
AS22927
Telefonica de Argentina
4M addresses · 110 ranges · AR
AS20057
ATT-MOBILITY-LLC-AS20057
4M addresses · 374 ranges · US
AS13285
OPALTELECOM-AS TalkTalk Communications Limited
4M addresses · 45 ranges · GB
AS5432
PROXIMUS-ISP-AS
3.9M addresses · 38 ranges · BE
AS2527
SO-NET Sony Network Communications Inc.
3.9M addresses · 71 ranges · JP
AS17557
PKTELECOM-AS-PK Pakistan Telecommunication Company Limited
3.7M addresses · 210 ranges · PK
AS719
ELISA-AS ELISA OYJ
3.7M addresses · 123 ranges · FI
AS2518
BIGLOBE BIGLOBE Inc.
3.7M addresses · 26 ranges · JP
AS12430
VODAFONE_ES
3.7M addresses · 55 ranges · ES
AS56046
CMNET-JIANGSU-AP China Mobile communications corporation
3.6M addresses · 740 ranges · CN
AS36351
SOFTLAYER
3.6M addresses · 201 ranges · US
AS4847
CNIX-AP China Networks Inter-Exchange
3.6M addresses · 421 ranges · CN
AS12874
FASTWEB
3.6M addresses · 62 ranges · IT
AS3303
SWISSCOM Swisscom Switzerland Ltd
3.5M addresses · 247 ranges · CH
AS45609
BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service
3.4M addresses · 202 ranges · IN
AS4249
LILLY-AS
3.3M addresses · 70 ranges · US
AS1759
TSF-IP-CORE Telia Finland Oyj
3.3M addresses · 94 ranges · FI
AS4788
TTSSB-MY TM TECHNOLOGY SERVICES SDN. BHD.
3.2M addresses · 64 ranges · MY
AS24940
HETZNER-AS
3.2M addresses · 82 ranges · DE
AS58224
TCI
3.2M addresses · 313 ranges · IR
AS4155
USDA-1
3.1M addresses · 19 ranges · US
AS14061
DIGITALOCEAN-ASN
3.1M addresses · 104 ranges · US
AS33491
COMCAST-33491
3.1M addresses · 305 ranges · US
AS3816
COLOMBIA TELECOMUNICACIONES S.A. ESP BIC
3.1M addresses · 211 ranges · CO
AS7545
TPG-INTERNET-AP TPG Telecom Limited
3.1M addresses · 1,195 ranges · AU
AS19901
BRSPD-PUBLIC
3M addresses · 335 ranges · US
AS17511
OPTAGE OPTAGE Inc.
3M addresses · 56 ranges · JP
AS56041
CMNET-ZHEJIANG-AP China Mobile communications corporation
3M addresses · 343 ranges · CN
AS9299
IPG-AS-AP Philippine Long Distance Telephone Company
3M addresses · 94 ranges · PH
AS12271
TWC-12271-NYC
2.9M addresses · 97 ranges · US
AS19108
SUDDENLINK-COMMUNICATIONS
2.8M addresses · 309 ranges · US
AS5769
VIDEOTRON
2.8M addresses · 125 ranges · CA
AS1761
TDIR-CAPNET
2.8M addresses · 18 ranges · US
AS137
ASGARR Consortium GARR
2.7M addresses · 62 ranges · IT
AS8447
A1TELEKOM-AT A1 Telekom Austria AG
2.7M addresses · 131 ranges · AT
AS35819
MOBILY-AS Etihad Etisalat Company Mobily
2.7M addresses · 76 ranges · SA
AS9394
CTTNET China TieTong Telecommunications Corporation
2.7M addresses · 31 ranges · CN
AS17816
CHINA169-GZ China Unicom IP network China169 Guangdong province
2.7M addresses · 201 ranges · CN
AS8434
TELENOR-SE Telenor Sverige AB
2.6M addresses · 75 ranges · SE
AS3741
IS
2.6M addresses · 313 ranges · ZA
AS668
DNIC-AS-00668
2.6M addresses · 129 ranges · US
AS9605
DOCOMO NTT DOCOMO, INC.
2.5M addresses · 134 ranges · JP
AS5378
Vodafone
2.5M addresses · 10 ranges · GB
AS8048
CANTV Servicios, Venezuela
2.5M addresses · 94 ranges · VE
AS2200
FR-RENATER Reseau National de telecommunications pour la Technologie
2.5M addresses · 98 ranges · FR
AS16637
MTNNS-AS
2.5M addresses · 82 ranges · ZA
AS37693
TUNISIANA
2.5M addresses · 28 ranges · TN
AS5384
EMIRATES-INTERNET Emirates Internet
2.4M addresses · 325 ranges · AE
AS36925
ASMedi
2.4M addresses · 28 ranges · MA
AS36903
MT-MPLS
2.4M addresses · 45 ranges · MA
AS7418
TELEFONICA CHILE S.A.
2.4M addresses · 69 ranges · CL
AS9158
TELENOR_DANMARK_AS
2.3M addresses · 25 ranges · DK
AS6848
TELENET-AS
2.3M addresses · 64 ranges · BE
AS197207
MCCI-AS
2.3M addresses · 99 ranges · IR
AS11404
AS-WAVE-1
2.3M addresses · 457 ranges · US
AS8167
V tal
2.3M addresses · 405 ranges · BR
AS33651
CMCS
2.3M addresses · 182 ranges · US
AS16591
GOOGLE-FIBER
2.2M addresses · 18 ranges · US
AS237
MERIT-AS-14
2.2M addresses · 53 ranges · US
AS559
SWITCH Switch, Swiss Academic and Research Network
2.2M addresses · 77 ranges · CH
AS24560
AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services
2.2M addresses · 540 ranges · IN
AS132203
TENCENT-NET-AP-CN Tencent Building, Kejizhongyi Avenue
2.2M addresses · 174 ranges · CN
AS6057
Administracion Nacional de Telecomunicaciones
2.2M addresses · 19 ranges · UY
AS23724
CHINANET-IDC-BJ-AP IDC, China Telecommunications Corporation
2.2M addresses · 356 ranges · CN
AS12400
PARTNER-AS
2.1M addresses · 48 ranges · IL
AS553
BELWUE BelWue-Koordination
2.1M addresses · 60 ranges · DE
AS9498
BBIL-AP BHARTI Airtel Ltd.
2.1M addresses · 955 ranges · IN
AS6871
PLUSNET UK Internet Service Provider
2.1M addresses · 48 ranges · GB
AS2514
INFOSPHERE NTT PC Communications, Inc.
2.1M addresses · 209 ranges · JP
AS6730
SUNRISE
2M addresses · 95 ranges · CH
AS6799
OTENET-GR Athens - Greece
2M addresses · 48 ranges · GR
AS56045
CMNET-JIANGXI-AP China Mobile communications corporation
2M addresses · 240 ranges · CN
AS81
NCREN
2M addresses · 69 ranges · US
AS13999
Mega Cable, S.A. de C.V.
1.9M addresses · 453 ranges · MX
AS10013
FBDC FreeBit Co.,Ltd.
1.9M addresses · 145 ranges · JP
AS37492
ORANGE-
1.9M addresses · 51 ranges · TN
AS24445
CMNET-V4HENAN-AS-AP Henan Mobile Communications Co.,Ltd
1.9M addresses · 246 ranges · CN
AS4725
ODN SoftBank Corp.
1.9M addresses · 107 ranges · JP
AS2152
CENIC-2152
1.9M addresses · 524 ranges · US
AS16086
DNA
1.9M addresses · 69 ranges · FI
AS5972
AS5972
1.9M addresses · 209 ranges · Unknown
AS270
AS270 - National Aeronautics and Space Administration
1.9M addresses · 79 ranges · US
AS33668
CMCS
1.9M addresses · 175 ranges · US
AS24444
CMNET-V4SHANDONG-AS-AP Shandong Mobile Communication Company Limited
1.8M addresses · 269 ranges · CN
AS1213
HEANET
1.8M addresses · 17 ranges · IE
AS3
MIT-GATEWAYS
1.8M addresses · 28 ranges · US
AS3243
MEO-RESIDENCIAL
1.8M addresses · 16 ranges · PT
AS1273
CW Vodafone Group PLC
1.8M addresses · 165 ranges · EU
AS9674
FET-TW Far EastTone Telecommunication Co., Ltd.
1.8M addresses · 32 ranges · TW
AS4760
HKTIMS-AP HKT Limited
1.8M addresses · 198 ranges · HK
AS8881
VERSATEL
1.8M addresses · 333 ranges · DE
AS10620
Telmex Colombia S.A.
1.8M addresses · 472 ranges · CO
AS50266
ODIDO
1.8M addresses · 27 ranges · NL
AS4181
TDS-AS
1.8M addresses · 163 ranges · US
AS2116
GLOBALCONNECT-
1.8M addresses · 127 ranges · NO
AS6739
ONO-AS Cableuropa - ONO
1.8M addresses · 77 ranges · ES
AS9812
CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.
1.8M addresses · 28 ranges · CN
AS9304
HUTCHISON-AS-AP HGC Global Communications Limited
1.8M addresses · 682 ranges · HK
AS8708
RCS-RDS 73-75 Dr. Staicovici
1.8M addresses · 120 ranges · RO
AS16232
ASN-TIM Service Provider
1.8M addresses · 10 ranges · IT
AS1101
IP-EEND-AS IP-EEND BV
1.8M addresses · 12 ranges · NL
AS2860
NOS_COMUNICACOES
1.8M addresses · 49 ranges · PT
AS8402
CORBINA-AS OJSC Vimpelcom
1.8M addresses · 126 ranges · RU
AS36935
Vodafone-
1.8M addresses · 103 ranges · EG
AS33652
CMCS
1.8M addresses · 161 ranges · US
AS33771
SAFARICOM-LIMITED
1.8M addresses · 26 ranges · KE
AS29975
VODACOM-
1.7M addresses · 22 ranges · ZA
AS24835
RAYA-AS
1.7M addresses · 108 ranges · EG
AS20214
COMCAST-20214
1.7M addresses · 184 ranges · US
AS37168
CELL-C
1.7M addresses · 7 ranges · ZA
AS4755
TATACOMM-AS TATA Communications formerly VSNL is Leading ISP
1.7M addresses · 587 ranges · IN
AS16135
TURKCELL-AS Turkcell A.S.
1.7M addresses · 58 ranges · TR
AS6306
TELEFONICA VENEZOLANA, C.A.
1.7M addresses · 23 ranges · VE
AS17421
EMOME-NET Mobile Business Group
1.7M addresses · 34 ranges · TW
AS10429
TELEFONICA BRASIL S.A
1.6M addresses · 57 ranges · BR
AS5483
MAGYAR-TELEKOM-MAIN-AS Magyar Telekom Nyrt.
1.6M addresses · 131 ranges · HU
AS4780
SEEDNET Digital United Inc.
1.6M addresses · 521 ranges · TW
AS9141
AS9141 P4 Play UPC PL network
1.6M addresses · 27 ranges · PL
AS55990
HWCSNET Huawei Cloud Service data center
1.6M addresses · 65 ranges · CN
AS9009
M247
1.6M addresses · 2,271 ranges · RO
AS27064
DNIC-ASBLK-27032-27159
1.6M addresses · 582 ranges · US
AS7385
ABUL-14-7385
1.6M addresses · 162 ranges · US
AS24863
LINKdotNET-AS
1.6M addresses · 176 ranges · EG
AS23693
TELKOMSEL-ASN-ID PT. Telekomunikasi Selular
1.6M addresses · 86 ranges · ID
AS6461
ZAYO-6461
1.6M addresses · 510 ranges · US
AS22085
Claro SA
1.6M addresses · 10 ranges · BR
AS7016
CCCH-3
1.6M addresses · 184 ranges · US
AS37457
Telkom-Internet
1.6M addresses · 180 ranges · ZA
AS1680
NV-ASN CELLCOM ltd.
1.6M addresses · 48 ranges · IL
AS25400
TELIA-NORWAY-AS Telia Norway Core Networks
1.6M addresses · 79 ranges · NO
AS22047
VTR BANDA ANCHA S.A.
1.6M addresses · 20 ranges · CL
AS8412
TMA Magenta Telekom
1.6M addresses · 60 ranges · AT
AS33657
CMCS
1.6M addresses · 173 ranges · US
AS5610
O2-CZECH-REPUBLIC
1.5M addresses · 46 ranges · CZ
AS8359
MTS
1.5M addresses · 267 ranges · RU
AS6147
Telefonica del Peru S.A.A.
1.5M addresses · 561 ranges · PE
AS9595
XEPHION NTT-ME Corporation
1.5M addresses · 29 ranges · JP
AS9924
TFN-TW Taiwan Fixed Network, Telco and Network Service Provider.
1.5M addresses · 179 ranges · TW
AS34984
TELLCOM-AS
1.5M addresses · 439 ranges · TR
AS18126
CTCX Chubu Telecommunications Company, Inc.
1.5M addresses · 35 ranges · JP
AS10695
WAL-MART
1.5M addresses · 39 ranges · US
AS10010
TOKAI TOKAI Communications Corporation
1.5M addresses · 104 ranges · JP
AS3479
PEACHNET-AS3479
1.5M addresses · 16 ranges · US
AS9269
HKBN-AS-AP Hong Kong Broadband Network Ltd.
1.5M addresses · 145 ranges · HK
AS8220
COLT COLT Technology Services Group Limited
1.5M addresses · 146 ranges · GB
AS2510
INFOWEB FUJITSU LIMITED
1.5M addresses · 99 ranges · JP
AS140292
CHINATELECOM-JIANGSU-SUZHOU-5G-NETWORK CHINATELECOM Jiangsu province Suzhou 5G network
1.5M addresses · 1,097 ranges · CN
AS15830
EQUINIX
1.5M addresses · 588 ranges · NL
AS367
DNIC-ASBLK-00306-00371
1.5M addresses · 294 ranges · US
AS9198
KAZTELECOM-AS
1.5M addresses · 189 ranges · KZ
AS11830
Instituto Costarricense de Electricidad y Telecom.
1.5M addresses · 449 ranges · CR
AS30036
MEDIACOM-ENTERPRISE-BUSINESS
1.5M addresses · 198 ranges · US
AS20473
AS-VULTR
1.5M addresses · 627 ranges · US
AS7725
COMCAST-7725
1.5M addresses · 248 ranges · US
AS9050
RTD Bucharest, Romania
1.5M addresses · 46 ranges · RO
AS2519
VECTANT ARTERIA Networks Corporation
1.5M addresses · 116 ranges · JP
AS5713
SAIX-NET
1.5M addresses · 120 ranges · ZA
AS36926
CKL1-ASN
1.4M addresses · 16 ranges · KE
AS210
WEST-NET-WEST
1.4M addresses · 21 ranges · US
AS18403
FPT-AS-AP FPT Telecom Company
1.4M addresses · 262 ranges · VN
AS13335
CLOUDFLARENET
1.4M addresses · 700 ranges · US
AS17552
TRUEONLINE-AS-AP True Online
1.4M addresses · 70 ranges · TH
AS36884
MAROCCONNECT
1.4M addresses · 22 ranges · MA
AS766
REDIRIS RedIRIS Autonomous System
1.4M addresses · 25 ranges · ES
AS2686
ATGS-MMD-AS
1.4M addresses · 122 ranges · US
AS63949
AKAMAI-LINODE-AP Akamai Connected Cloud
1.4M addresses · 79 ranges · SG
AS7738
V tal
1.3M addresses · 113 ranges · BR
AS15169
GOOGLE
1.3M addresses · 152 ranges · US
AS47583
AS-HOSTINGER
1.3M addresses · 371 ranges · CY
AS51207
FREEM
1.3M addresses · 4 ranges · FR
AS33287
COMCAST-33287
1.3M addresses · 152 ranges · US
AS8987
AWS-GOVCLOUD AWS-GOVCLOUD
1.3M addresses · 85 ranges · US
AS327934
Tunisie-Telecom
1.3M addresses · 31 ranges · TN
AS4685
ASAHI-NET Asahi Net
1.3M addresses · 53 ranges · JP
AS51964
ORANGE-BUSINESS-SERVICES-IPSN-ASN
1.3M addresses · 140 ranges · US
AS39891
ALJAWWALSTC-AS
1.3M addresses · 68 ranges · SA
AS137266
CHINATELECOM-HUBEI-WUHAN-5G-NETWORK CHINATELECOM Hubei province Wuhan 5G network
1.3M addresses · 112 ranges · CN
AS11492
CABLEONE
1.3M addresses · 472 ranges · US
AS6503
Axtel, S.A.B. de C.V.
1.3M addresses · 321 ranges · MX
AS12091
MTNNS-1
1.2M addresses · 17 ranges · ZA
AS44244
IRANCELL-AS
1.2M addresses · 8 ranges · IR
AS5619
NO-TTSN-ASN1 TietoEVRY Norway
1.2M addresses · 14 ranges · NO
AS4637
ASN-TELSTRA-GLOBAL Telstra Global
1.2M addresses · 341 ranges · HK
AS7459
GRANDECOM-AS1
1.2M addresses · 255 ranges · US
AS22561
CENTURYLINK-LEGACY-LIGHTCORE
1.2M addresses · 197 ranges · US
AS12741
AS-NETIA Warszawa 02-822
1.2M addresses · 166 ranges · PL
AS9416
MULTIMEDIA-AS-AP Hoshin Multimedia Center Inc.
1.2M addresses · 34 ranges · TW
AS16019
VODAFONE-CZ-AS
1.2M addresses · 46 ranges · CZ
AS12353
VODAFONE-PT Vodafone Portugal
1.2M addresses · 26 ranges · PT
AS6830
LIBERTYGLOBAL Liberty Global formerly UPC Broadband Holding, aka AORTA
1.2M addresses · 108 ranges · NL
AS4010
DNIC-AS-04010
1.2M addresses · 11 ranges · US
AS378
MACHBA-AS ILAN
1.2M addresses · 39 ranges · IL
AS9617
ZAQ JCOM Co., Ltd.
1.2M addresses · 17 ranges · JP
AS15802
DU-AS1
1.2M addresses · 18 ranges · AE
AS3371
MCI-ASN
1.2M addresses · 69 ranges · US
AS6619
SAMSUNGSDS-AS-KR SamsungSDS Inc.
1.2M addresses · 84 ranges · KR
AS12714
MEGAFON-AS Moscow, Russia
1.2M addresses · 196 ranges · RU
AS72
SCHLUMBERGER-AS
1.2M addresses · 68 ranges · US
AS23969
TOT-NET TOT Public Company Limited
1.2M addresses · 186 ranges · TH
AS2018
TENET-1
1.1M addresses · 145 ranges · ZA
AS33659
CMCS
1.1M addresses · 126 ranges · US
AS136907
HWCLOUDS-AS-AP HUAWEI CLOUDS
1.1M addresses · 135 ranges · HK
AS9443
VOCUS-RETAIL-AU Vocus Retail
1.1M addresses · 42 ranges · AU
AS7155
VIASAT-SP-BACKBONE
1.1M addresses · 111 ranges · US
AS109
CISCOSYSTEMS
1.1M addresses · 30 ranges · US
AS7575
AARNET-AS-AP Australian Academic and Research Network AARNet
1.1M addresses · 124 ranges · AU
AS3329
HOL-GR Athens, Greece
1.1M addresses · 97 ranges · GR
AS56048
CMNET-BEIJING-AP China Mobile Communicaitons Corporation
1.1M addresses · 236 ranges · CN
AS11664
Techtel LMDS Comunicaciones Interactivas S.A.
1.1M addresses · 202 ranges · AR
AS5391
T-HT Croatian Telecom Inc.
1.1M addresses · 27 ranges · HR
AS5006
VOYANT
1.1M addresses · 149 ranges · US
AS6535
Telmex Servicios Empresariales S.A.
1.1M addresses · 40 ranges · CL
AS5466
EIRCOM Internet House
1.1M addresses · 24 ranges · IE
AS9316
DACOM-PUBNETPLUS-AS-KR DACOM-PUBNETPLUS
1.1M addresses · 253 ranges · KR
AS133612
VODAFONE-AS-AP Vodafone Australia Pty Ltd
1.1M addresses · 36 ranges · AU
AS12912
TM
1.1M addresses · 82 ranges · PL
AS22284
AS22284-DOI-OPS
1.1M addresses · 110 ranges · US
AS29695
ALTIBOX_AS Norway
1.1M addresses · 58 ranges · NO
AS22909
COMCAST-22909
1.1M addresses · 201 ranges · US
AS8070
MICROSOFT-CORP-MSN-AS-BLOCK
1.1M addresses · 24 ranges · US
AS37100
SEACOM-AS
1.1M addresses · 8 ranges · MU
AS6697
BELPAK-AS BELPAK
1.1M addresses · 93 ranges · BY
AS30986
SCANCOM
1.1M addresses · 15 ranges · GH
AS212238
CDNEXT
1.1M addresses · 2,427 ranges · GB
AS11776
ATLANTICBB-JOHNSTOWN
1.1M addresses · 197 ranges · US
AS224
UNINETT UNINETT, The Norwegian University & Research Network
1.1M addresses · 16 ranges · NO
AS2764
AAPT AAPT Limited
1M addresses · 1,073 ranges · AU
AS46690
SNET-FCC
1M addresses · 2 ranges · US
AS4694
IDCF IDC Frontier Inc.
1M addresses · 123 ranges · JP
AS1226
CTA-42-AS1226
1M addresses · 25 ranges · US
AS12302
VODAFONE_RO Charles de Gaulle nr.15
1M addresses · 130 ranges · RO
AS8866
VIVACOM-AS BULGARIA
1M addresses · 270 ranges · BG
AS44034
HI3G
1M addresses · 10 ranges · SE
AS808
GONET-ASN-1
1M addresses · 19 ranges · CA
AS13367
COMCAST-13367
1M addresses · 105 ranges · US
AS17429
BGCTVNET BEIJING GEHUA CATV NETWORK CO.LTD
1000K addresses · 16 ranges · CN
AS17488
HATHWAY-NET-AP Hathway IP Over Cable Internet
999K addresses · 45 ranges · IN
AS33667
CMCS
999K addresses · 177 ranges · US
AS36352
AS-COLOCROSSING
994K addresses · 724 ranges · US
AS13036
TMOBILE-
992K addresses · 33 ranges · CZ
AS7992
COGECOWAVE
989K addresses · 38 ranges · CA
AS14593
SPACEX-STARLINK
986K addresses · 152 ranges · US
AS11556
Cable & Wireless Panama
986K addresses · 39 ranges · PA
AS29447
TIF-AS Iliad Italia S.p.A
983K addresses · 5 ranges · FR
AS18676
AVAYA
979K addresses · 30 ranges · US
AS8551
BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbone
979K addresses · 107 ranges · IL
AS203020
HOSTROYALE
977K addresses · 724 ranges · IN
AS56044
CMNET-AS-LIAONING China Mobile communications corporation
973K addresses · 96 ranges · CN
AS4811
CHINANET-SHANGHAI-MAN China Telecom Group
968K addresses · 298 ranges · CN
AS14754
TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA
962K addresses · 194 ranges · GT
AS20055
AS-WHOLESAIL
952K addresses · 64 ranges · US
AS23889
MauritiusTelecom
946K addresses · 60 ranges · MU
AS7792
3M-HDQ-AS
942K addresses · 10 ranges · US
AS15895
KSNET-AS
941K addresses · 27 ranges · UA
AS37518
FIBERGRID
934K addresses · 227 ranges · SC
AS637
DNIC-ASBLK-00616-00665
930K addresses · 188 ranges · US
AS9506
SINGTEL-FIBRE Singtel Fibre Broadband
929K addresses · 69 ranges · SG
AS376
RISQ-AS
921K addresses · 121 ranges · CA
AS9145
EWETEL
921K addresses · 44 ranges · DE
AS37287
ZAIN-ZAMBIA
919K addresses · 9 ranges · ZM
AS20676
PLUSNET *****************
918K addresses · 60 ranges · DE
AS14654
WAYPORT
916K addresses · 53 ranges · US
AS19527
GOOGLE-2
914K addresses · 86 ranges · US
AS158
ERI-AS
912K addresses · 62 ranges · US
AS8426
CLARANET-AS ClaraNET LTD
905K addresses · 81 ranges · GB
AS3633
PROVINCE-OF-BRITISH-COLUMBIA
904K addresses · 71 ranges · CA
AS600
OARNET-AS
900K addresses · 103 ranges · US
AS47377
ORANGE_BELGIUM_SA New company name is Orange Belgium SA
898K addresses · 43 ranges · BE
AS12083
WOW-INTERNET
891K addresses · 274 ranges · US
AS21334
ASN-VODAFONE-
886K addresses · 27 ranges · HU
AS2675
CDAGOVN
879K addresses · 162 ranges · CA
AS36937
Neotel-AS
879K addresses · 25 ranges · ZA
AS19429
ETB - Colombia
872K addresses · 189 ranges · CO
AS7497
CSTNET-AS-AP Computer Network Information Center of Chinese Academy of Sciences CNIC-CAS
868K addresses · 124 ranges · CN
AS2611
BELNET
867K addresses · 32 ranges · BE
AS8764
TELIA-LIETUVA
862K addresses · 76 ranges · LT
AS29518
BREDBAND2
858K addresses · 91 ranges · SE
AS9500
ONENZ-TRANSIT-AS One New Zealand Group Limited
857K addresses · 16 ranges · NZ
AS33490
COMCAST-33490
853K addresses · 124 ranges · US
AS2852
CESNET2
850K addresses · 20 ranges · CZ
AS3216
SOVAM-AS
847K addresses · 334 ranges · RU
AS36974
MTNCI-AS
847K addresses · 34 ranges · CI
AS6400
Compania Dominicana de Telefonos S. A.
844K addresses · 53 ranges · DO
AS37705
TOPNET
843K addresses · 22 ranges · TN
AS33588
BRESNAN-33588
842K addresses · 34 ranges · US
AS29256
INT-PDN-STE-AS STE PDN Internal AS
840K addresses · 142 ranges · SY
AS10036
CNM-AS-KR DLIVE
840K addresses · 58 ranges · KR
AS15704
XTRA Telecom
837K addresses · 155 ranges · ES
AS56040
CMNET-GUANGDONG-AP China Mobile communications corporation
837K addresses · 519 ranges · CN
AS1906
NORTHROP-GRUMMAN
834K addresses · 42 ranges · US
AS36994
Vodacom-VB
830K addresses · 53 ranges · ZA
AS14340
SALESFORCE
830K addresses · 28 ranges · US
AS36375
UMICH-AS-5
826K addresses · 12 ranges · US
AS17378
AS17378 - TierPoint, LLC
824K addresses · 270 ranges · US
AS8400
TELEKOM-AS
824K addresses · 66 ranges · RS
AS8968
BT-ITALIA
822K addresses · 19 ranges · IT
AS3491
CONSOLE-CONNECT-ASN
821K addresses · 236 ranges · HK
AS6181
FUSE-NET
819K addresses · 68 ranges · US
AS37075
ZAINUGAS
817K addresses · 14 ranges · UG
AS46887
CROWNCASTLE-AS46887
813K addresses · 334 ranges · US
AS17621
CNCGROUP-SH China Unicom Shanghai network
806K addresses · 177 ranges · CN
AS23700
FASTNET-AS-ID Linknet-Fastnet ASN
805K addresses · 17 ranges · ID
AS20978
TT_MOBIL Istanbul
804K addresses · 22 ranges · TR
AS10474
OPTINET
802K addresses · 185 ranges · ZA
AS33070
RMH-14
799K addresses · 71 ranges · US
AS9848
SEJONGTELECOM-AS-KR SEJONG NETWORKS
796K addresses · 331 ranges · KR
AS23201
Telecel S.A.
790K addresses · 66 ranges · PY
AS9583
SIFY-AS-IN Sify Limited
787K addresses · 398 ranges · IN
AS56047
CMNET-HUNAN-AP China Mobile communications corporation
786K addresses · 265 ranges · CN
AS231
MISU-231
783K addresses · 7 ranges · US
AS9457
DREAMX-AS DREAMLINE CO.
783K addresses · 176 ranges · KR
AS5603
SIOL-NET Telekom Slovenije d.d.
782K addresses · 29 ranges · SI
AS11232
MIDCO-NET
780K addresses · 75 ranges · US
AS855
CANET-ASN-4
779K addresses · 279 ranges · CA
AS20011
INTERNET-SOLUTIONS
776K addresses · 215 ranges · ZA
AS8560
IONOS-AS This is the joint network for IONOS, Fasthosts, Arsys, 1&1 Mail and Media and 1&1 Telecom. Formerly known as 1&1 Internet SE.
775K addresses · 243 ranges · DE
AS4771
SPARKNZ Spark New Zealand Trading Ltd.
771K addresses · 107 ranges · NZ
AS58593
BLUECLOUD Shanghai Blue Cloud Technology Co.,Ltd
771K addresses · 13 ranges · CN
AS8103
STATE-OF-FLA
771K addresses · 246 ranges · US
AS24400
CMNET-V4SHANGHAI-AS-AP Shanghai Mobile Communications Co.,Ltd.
762K addresses · 196 ranges · CN
AS7679
QTNET QTnet,Inc.
761K addresses · 33 ranges · JP
AS45820
TTSL-MEISISP Tata Teleservices ISP AS
758K addresses · 82 ranges · IN
AS243
HARRIS-ATD-AS
751K addresses · 84 ranges · US
AS45758
TTBP-AS-AP Triple T Broadband Public Company Limited
748K addresses · 52 ranges · TH
AS15897
VODAFONETURKEY
745K addresses · 44 ranges · TR
AS2572
MORENET
744K addresses · 21 ranges · US
AS9930
TTNET-MY TIME dotCom Berhad No. 14, Jalan Majistret U126 Hicom Glenmarie Industrial Park 40150 Shah Alam Selangor, Malaysia
741K addresses · 57 ranges · MY
AS11686
ENA
735K addresses · 55 ranges · US
AS5645
TEKSAVVY
733K addresses · 53 ranges · CA
AS5413
WAVENET-AS5413
732K addresses · 87 ranges · GB
AS2687
ATGS-MMD-AS
727K addresses · 113 ranges · US
AS6325
ILLINOIS-CENTURY
726K addresses · 51 ranges · US
AS17962
TOPWAY-NET ShenZhen Topway Video Communication Co. Ltd
723K addresses · 14 ranges · CN
AS24547
CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited
722K addresses · 148 ranges · CN
AS14265
US-TELEPACIFIC
717K addresses · 219 ranges · US
AS5400
BT
713K addresses · 67 ranges · GB
AS55430
STARHUB-NGNBN Starhub Ltd
713K addresses · 25 ranges · SG
AS703
UUNET
695K addresses · 60 ranges · US
AS3758
SINGNET SingNet
694K addresses · 293 ranges · SG
AS21508
COMCAST-21508
689K addresses · 135 ranges · US
AS3737
AS-PTD
687K addresses · 34 ranges · US
AS8011
MONGO-8011
680K addresses · 11 ranges · US
AS17813
MTNL-AP Mahanagar Telephone Nigam Limited
680K addresses · 27 ranges · IN
AS4739
INTERNODE-AS Internode Pty Ltd
678K addresses · 206 ranges · AU
AS14080
Telmex Colombia S.A.
676K addresses · 356 ranges · CO
AS38266
VIL-AS-AP Vodafone Idea Ltd
676K addresses · 68 ranges · IN
AS46375
AS-SONICTELECOM
673K addresses · 38 ranges · US
AS21859
ZEN-ECN
669K addresses · 647 ranges · US
AS22258
COMCAST-22258
664K addresses · 91 ranges · US
AS7470
TRUEINTERNET-AS-AP TRUE INTERNET Co.,Ltd.
664K addresses · 280 ranges · TH
AS6855
SK-TELEKOM Slovak Telekom T-Mobile CZ
663K addresses · 32 ranges · SK
AS8781
QA-ISP
661K addresses · 54 ranges · QA
AS22516
CHARTER-22516-CENTRAL-CA-C3
661K addresses · 83 ranges · US
AS1916
Rede Nacional de Ensino e Pesquisa
661K addresses · 86 ranges · BR
AS31822
CITY-UNIVERSITY-OF-NEW-YORK
660K addresses · 11 ranges · US
AS4193
WA-STATE-GOV
656K addresses · 25 ranges · US
AS3128
BRUWS-AS3128
656K addresses · 11 ranges · US
AS20845
DIGICABLE
652K addresses · 88 ranges · HU
AS9929
CUII CHINA UNICOM Industrial Internet Backbone
651K addresses · 165 ranges · CN
AS297
AS297 - National Aeronautics and Space Administration
649K addresses · 27 ranges · US
AS33489
COMCAST-33489
648K addresses · 176 ranges · US
AS12252
America Movil Peru S.A.C.
647K addresses · 139 ranges · PE
AS14962
NCR-252
637K addresses · 17 ranges · US
AS29355
KCELL-AS
633K addresses · 20 ranges · KZ
AS42961
GPRS-AS ZAIN
633K addresses · 16 ranges · KW
AS4721
JCN JCOM Co., Ltd.
632K addresses · 52 ranges · JP
AS33661
CMCS
630K addresses · 162 ranges · US
AS10753
LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE
625K addresses · 663 ranges · US
AS27747
Telecentro S.A.
623K addresses · 30 ranges · AR
AS87
INDIANA-AS
623K addresses · 10 ranges · US
AS33660
CMCS
622K addresses · 93 ranges · US
AS3302
AS-IRIDEOS
618K addresses · 55 ranges · IT
AS13768
COGECO-PEER1
616K addresses · 299 ranges · CA
AS17709
APT Asia Pacific Telecom
616K addresses · 51 ranges · TW
AS14522
SERVICIOS DE TELECOMUNICACIONES SETEL S.A. XTRIM EC
615K addresses · 44 ranges · EC
AS1741
FUNETAS
610K addresses · 16 ranges · FI
AS31655
ASN-GAMMATELECOM
610K addresses · 30 ranges · GB
AS9790
TWO-DEGREES-AS-AP Two Degrees Networks Limited
607K addresses · 75 ranges · NZ
Looking for a specific address?
The directory answers "who announces this range." To check whether a particular address is a Tor exit or sits in a published cloud range, look it up with the free lookup tool. Whether a visitor is on a VPN or proxy is a property of the live connection, not of the AS or the bare address, so that verdict needs a live visit checked with /v1/evaluate.
Questions
What is an ASN?
An autonomous system number (ASN) identifies a network that announces its own blocks of IP addresses to the internet's routing table: an internet provider, a mobile carrier, a hosting company, a university or a large company. The AS number and its registry name say who routes an address, not who is using it.
How do I find the ASN of an IP address?
Type the address into the lookup box above. The answer names the autonomous system that announces the range the address sits in, with its registry name and country and a link to the AS page and its announced ranges. IPv4 and IPv6 addresses both work.
Does an ASN tell you whether an address is a VPN or a proxy?
No. VPN services rent space from hosting companies and residential proxies run on home connections, so the same AS carries ordinary customers and anonymised traffic. Maskbreak keeps routing data out of its risk score: its VPN and proxy verdicts come from a live visit, not from the AS.
Where does the data come from?
From the public global routing table, refreshed daily. Names and countries are the networks' own registry records, so a company can appear under its network handle, such as AMAZON-02 for part of Amazon's space.