Network directory (AS numbers)
Every public IP address is announced by an autonomous system. The AS number tells you whose network a website’s address sits in, which is often not the company that runs the site.
Names identify network operators so that lookups can be read. They do not imply partnership or endorsement, and nothing here ranks one network against another.
CDN and edge networks
Reverse proxies in front of other people’s servers. An address here is the edge, not the origin.
AS13335 · Cloudflare
Cloudflare’s main network. It carries the company’s CDN and reverse proxy, its authoritative DNS service and the 1.1.1.1 public resolver, announced by anycast from many locations.
AS54113 · Fastly
Fastly’s edge network, an anycast CDN. Some hosted platforms are delivered through it, so a site can appear here without being a direct Fastly customer.
AS20940 · Akamai
The AS number under which Akamai’s European entity announces most of the Akamai edge platform. Akamai places servers inside many other networks too, so Akamai-delivered sites also appear under other AS numbers.
AS16625 · Akamai Technologies
An AS number of Akamai Technologies in the United States, used alongside AS20940 for the Akamai edge platform.
AS19551 · Imperva (Incapsula)
The network of Imperva’s cloud web application firewall and DDoS protection service, registered under its earlier name Incapsula.
AS60068 · CDN77 (Datacamp)
The network of Datacamp Limited, which operates the CDN77 content delivery network.
AS200325 · bunny.net
The network of bunny.net (BunnyWay), a content delivery network company from Slovenia.
Cloud platforms
Rented compute, storage and load balancers. The tenant, not the platform, runs the site.
AS16509 · Amazon Web Services
The main AS number of Amazon Web Services. Most AWS regions, including EC2 instances, load balancers and the CloudFront CDN, announce addresses from it.
AS14618 · Amazon Web Services (AMAZON-AES)
An older Amazon AS number, registered as AMAZON-AES, that still carries part of the address space of AWS in North America.
AS15169 · Google
Google’s main network: Search, Gmail, YouTube delivery, the 8.8.8.8 public resolver and Google’s front ends for customer services all use it.
AS396982 · Google Cloud Platform
The AS number registered as GOOGLE-CLOUD-PLATFORM. It carries customer virtual machines and services of Google Cloud, separately from Google’s own services in AS15169.
AS8075 · Microsoft
Microsoft’s global network. Azure, Microsoft 365 (including Exchange Online mail servers) and Microsoft’s own sites are announced from it.
AS31898 · Oracle Cloud
The network of Oracle Cloud Infrastructure.
AS36351 · IBM Cloud (SoftLayer)
The network registered as SOFTLAYER. SoftLayer was a hosting company that IBM bought in 2013; the AS now carries IBM Cloud infrastructure.
AS45102 · Alibaba Cloud
One of the AS numbers of Alibaba Cloud. Alibaba uses more than one AS number, so its addresses also appear under others.
AS14061 · DigitalOcean
The network of DigitalOcean, a cloud provider known for its virtual servers ("droplets").
AS20473 · Vultr
The network of The Constant Company, which operates the Vultr cloud platform. The registry data names the company, not the brand.
AS63949 · Akamai Connected Cloud (Linode)
The network of Linode, a cloud provider that Akamai bought in 2022 and now markets as Akamai Connected Cloud.
Hosting companies
Shared hosting, virtual and dedicated servers.
AS24940 · Hetzner
The network of Hetzner Online, a German hosting company known for dedicated and cloud servers.
AS16276 · OVHcloud
The network of OVHcloud, a French hosting and cloud company. A single AS number covers its data centres in several countries.
AS12876 · Scaleway
The network of Scaleway, the cloud company of the Iliad group in France. It was earlier registered as Online SAS, which also ran the Dedibox servers.
AS29169 · Gandi
The network of Gandi, the French registrar, used for its hosting and mail services.
AS8560 · IONOS
The network of IONOS, the hosting company of the United Internet group in Germany, earlier known as 1&1.
AS51167 · Contabo
The network of Contabo, a German hosting company known for virtual and dedicated servers.
AS60781 · Leaseweb Netherlands
The AS number of Leaseweb’s Dutch entity. Leaseweb uses separate AS numbers for its companies in other countries.
AS47583 · Hostinger
The network of Hostinger. Hostinger’s shared and VPS hosting in several regions is announced from it.
AS26496 · GoDaddy
GoDaddy’s hosting network in the United States: shared hosting, website builder sites and parked domains.
AS22612 · Namecheap
Namecheap’s own network, used for its hosting, mail and parking services.
AS46606 · Unified Layer (Bluehost, HostGator)
Unified Layer is the network name behind the hosting brands of Newfold Digital (earlier Endurance International), including Bluehost and HostGator. Records name Unified Layer, not the brand.
AS197695 · REG.RU
The hosting network of REG.RU, the Russian registrar.
AS198610 · Beget
The network of Beget, a Russian shared hosting company.
AS49505 · Selectel
The network of Selectel, a Russian data-centre and cloud company.
AS42926 · Radore
The network of Radore, a data-centre and hosting company in Türkiye.
AS43391 · Netdirekt
The network of Netdirekt, a hosting and data-centre company in Türkiye.
AS34619 · Çizgi Telekom
The network of Çizgi Telekom, a hosting company in Türkiye.
Content and platform networks
Networks that mainly carry their operator’s own services.
AS36459 · GitHub
GitHub’s own network, used for github.com itself. GitHub Pages sites are served through a CDN, so they usually do not appear under this AS.
AS32934 · Meta (Facebook)
The network of Meta, still registered under the name Facebook, Inc. It carries Facebook, Instagram and WhatsApp.
AS13238 · Yandex
Yandex’s main network: search, Yandex 360 mail servers and the company’s other services.
Access providers
Networks that connect homes, phones and offices.
AS9121 · Türk Telekom
The main AS number of Türk Telekom, the incumbent fixed-line operator in Türkiye. The registry data still shows its earlier internet brand, TTNet.
AS34984 · Turkcell Superonline
The network of Turkcell Superonline, the fixed broadband and fibre company of the Turkcell group. It is registered under the older name TELLCOM.
AS15897 · Vodafone Türkiye
The network of Vodafone in Türkiye.
AS12735 · TurkNet
The network of TurkNet, a broadband provider in Türkiye.
AS3320 · Deutsche Telekom
The network of Deutsche Telekom: broadband and mobile customers in Germany and an international backbone.
AS3215 · Orange
The domestic network of Orange in France: broadband and mobile customers.
AS3352 · Telefónica de España
The domestic network of Telefónica in Spain, which sells under the Movistar brand.
AS12389 · Rostelecom
The main network of Rostelecom, a fixed-line and broadband operator in Russia.
Backbone and transit
Carriers that move traffic between other networks.
AS3356 · Lumen (Level 3)
The backbone registered as LEVEL3. Level 3 Communications became part of CenturyLink, which now trades as Lumen.
AS174 · Cogent Communications
The backbone of Cogent Communications, a transit carrier based in the United States.
AS6939 · Hurricane Electric
The backbone of Hurricane Electric, a transit carrier based in California that is also known for its IPv6 tunnel service.