Routing intelligence
Look up any autonomous system.
An ASN is the unit the internet actually routes on. It tells you far more about who is carrying a connection than a city-level geolocation guess ever will.
Hosting / cloud networks
243
VPN-associated networks
54
Mobile carriers
64
US residential ISPs
86
Frequently looked up
AS13335 · CloudflareAS15169 · GoogleAS16509 · Amazon AWSAS7922 · Comcast XfinityAS701 · VerizonAS7018 · AT&TAS20115 · Charter / SpectrumAS22773 · Cox CommunicationsAS8075 · Microsoft AzureAS32934 · lookupAS714 · lookupAS2906 · lookupAS14061 · DigitalOceanAS20473 · Vultr (The Constant Company)AS24940 · HetznerAS16276 · OVHcloudAS60068 · Datacamp / CDN77AS9009 · M247AS21928 · T-Mobile USAS6167 · Verizon Wireless