Network tool
ASN Lookup
Look up the autonomous system, network prefix, and operator associated with a public IP address.
What this result means
An ASN identifies a network under one routing policy. The returned network information describes routing and network ownership, not an individual user or exact physical location.
How this check works
This lookup accepts a public IPv4 or IPv6 address, or a public ASN such as AS13335. IP results use available IP intelligence; ASN results use RDAP registration data.
Results depend on available IP intelligence and may be incomplete or change as prefixes are reassigned or routing records are updated.
Learn more: What Is an ASN? →