Autonomous System directory
Major networks and their AS numbers, each with a page of live routing data: announced prefixes, address count, upstreams and downstreams.
Looking for the network behind one address? ASN lookup and BGP viewer
Cloud and hosting
- Amazon Web ServicesAS16509
- GoogleAS15169
- Google CloudAS396982
- MicrosoftAS8075
- CloudflareAS13335
- HetznerAS24940
- OVHcloudAS16276
- DigitalOceanAS14061
- Akamai Cloud (Linode)AS63949
- VultrAS20473
- Oracle CloudAS31898
- Alibaba CloudAS45102
- Alibaba Cloud (China)AS37963
- Tencent CloudAS132203
- Huawei CloudAS136907
- ScalewayAS12876
- IONOSAS8560
- ContaboAS51167
- LeasewebAS60781
- HostingerAS47583
- GoDaddyAS26496
- netcupAS197540
- StratoAS6724
- InfomaniakAS29222
- IBM Cloud (SoftLayer)AS36351
- Fly.ioAS40509
- M247AS9009
- ZenlayerAS21859
- GcoreAS199524
- UpCloudAS202053
- Aruba.itAS31034
- LocawebAS27715
Content, CDNs and online services
- FastlyAS54113
- Akamai InternationalAS20940
- AkamaiAS16625
- Meta (Facebook)AS32934
- NetflixAS2906
- AppleAS714
- Apple (Austin)AS6185
- CDN77 (DataCamp)AS60068
- bunny.netAS200325
- Imperva (Incapsula)AS19551
- X (Twitter)AS13414
- LinkedInAS14413
- WikimediaAS14907
- Valve (Steam)AS32590
- Riot GamesAS6507
- RobloxAS22697
- TikTokAS138699
- YahooAS10310
- DropboxAS19679
- GitHubAS36459
- ZoomAS30103
- SalesforceAS14340
- BlizzardAS57976
- Quad9AS19281
- Cisco OpenDNSAS36692
- YouTube (Google)AS36040
Transit carriers
- ArelionAS1299
- Lumen (Level 3)AS3356
- CogentAS174
- NTTAS2914
- Hurricane ElectricAS6939
- Tata CommunicationsAS6453
- ZayoAS6461
- GTTAS3257
- Orange International Carriers (OpenTransit)AS5511
- Telecom Italia SparkleAS6762
- Telefónica Global Solutions (Telxius)AS12956
- VerizonAS701
- PCCW GlobalAS3491
- Liberty GlobalAS6830
- Cable & WirelessAS1273
- RETNAS9002
- China TelecomAS4134
- China Telecom (CN2)AS4809
- China UnicomAS4837
- China MobileAS9808
- SingtelAS7473
- KDDIAS2516
- TelstraAS4637
- ColtAS8220
- Init7AS13030
- Bharti AirtelAS9498
- RostelecomAS12389
- BICSAS6774
- VocusAS4826
- SEACOMAS37100
Internet providers in Germany
Internet providers in France
Internet providers in Spain
Internet providers in Portugal
Internet providers in Brazil
Internet providers in Italy
Internet providers in the United States
Internet providers in the United Kingdom
Each number was checked against the RIPEstat registry on 16 October 2026. A company often holds several numbers; the list gives the main ones.
About AS numbers
Every network that exchanges routes on the Internet has an AS number. It identifies the network in BGP announcements, in traceroutes and in abuse reports, and it is the quickest way to know who operates an address: a cloud, a carrier or the access provider of a home connection.
Each page of the directory reads RIPE RIS route collectors: the prefixes the network announces right now, how many IPv4 addresses they cover, and the networks it connects to. From there you can trace a route to the network or open one of its prefixes in the BGP viewer.