NETWORK TOOL
ASN Lookup
Explore autonomous system information by IP address or AS number.
About ASNs
What is an ASN?
An Autonomous System Number identifies a network, such as an ISP, cloud provider or large company, that manages its own routing on the internet.
What is a prefix?
A prefix is a block of IP addresses, like 203.0.113.0/24, announced by an autonomous system so traffic can find its way to those addresses.
Where does this data come from?
Results come from RIPE NCC's public RIPEstat service, which tracks global routing information.