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ASN WHOIS Lookup

Look up the owner and details of an Autonomous System Number.

An Autonomous System (AS) is a network operated by a single organization. Look up any AS number to find its owner, description, and the country where it is registered.

The correct regional registry is discovered automatically from IANA data.

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IP LookupFull intelligence report for any IPv4 or IPv6 address.IP WHOIS LookupFind the registrant and network details behind an IP block.

Frequently asked questions

What is an ASN?

An Autonomous System Number identifies a network operated by one organization, such as a large ISP or a cloud provider.