ASN / IP Network Lookup
Look up ASN information, network prefixes, and BGP routing data
This tool queries RIPE Stat to provide network and routing information for IP addresses and ASNs.
IP Address Lookup
Find the network prefix, ASN, and organization that owns an IP address.
ASN Lookup
Look up information about an Autonomous System Number including its holder and BGP state.
What is an ASN? An Autonomous System Number (ASN) is a unique identifier assigned to networks on the internet. Major companies like Cloudflare (AS13335), Google (AS15169), and Amazon (AS16509) each have their own ASNs.
Features
- Look up ASN information by number
- Find ASN and prefix for any IP address
- View BGP routing state and AS paths
- See network holder/organization
- Auto-detect IP vs ASN input
- Copy results with one click
Frequently Asked Questions
What is an ASN?
An Autonomous System Number (ASN) is a unique identifier assigned to networks on the internet. Major companies like Cloudflare (AS13335), Google (AS15169), and Amazon (AS16509) each have their own ASNs.
What is BGP?
Border Gateway Protocol (BGP) is how networks on the internet share routing information. BGP state shows how traffic is routed through different autonomous systems.
What data source is used?
This tool uses RIPE Stat, a public API provided by RIPE NCC that aggregates internet routing and registration data.