ASN lookup
Which network is this?
Enter an AS number or an IP address. We show who announces the address, who owns the AS number, and the address blocks it announces.
Looks things up straight from your browser. When you press the button, this page asks Team Cymru's DNS service, registry (RDAP) services and RIPEstat directly, with no cookies and no referrer. We never see the lookup. Private addresses and internal names are never sent. Nothing is saved, and reloading clears everything.