ASN Lookup Directory
Reference pages for the autonomous systems behind the IPs you see in your logs, network traces, and traffic analytics. Looking up a specific IP? Use our IP lookup tool instead.
Hyperscalers
Google's primary autonomous system, covering search, Gmail, YouTube, Workspace, Cloud, and Android services.
Meta's primary AS — Facebook, Instagram, WhatsApp, Messenger, Threads.
Microsoft's main AS — Azure, Microsoft 365, Bing, Xbox Live, Outlook.com, GitHub edge.
CDN providers
Cloud hosting
Secondary AWS AS, common for newer regions and certain managed services.
Amazon's primary AWS autonomous system. Most EC2, ELB, and CloudFront traffic originates here.
DigitalOcean's main AS — droplets, managed databases, app platform.
Google Cloud Platform's customer-facing AS, distinct from Google's consumer products on AS15169.
Hetzner — major German hosting provider known for cheap, powerful dedicated and cloud servers.
OVH — large French cloud provider, datacenters in France, Canada, and elsewhere.
Major ISPs
AT&T's primary US consumer and enterprise ISP backbone.
Comcast Xfinity — largest US cable internet provider.
Deutsche Telekom — Germany's largest ISP, plus pan-European backbone.
Verizon's enterprise and former UUNET backbone — one of the original tier-1 networks.