IP & Network

ASN Lookup

Query the Cymru whois service to find the ASN, prefix, country, registry, and organization name for any IPv4 or IPv6 address or ASN number. Used for BGP and routing research.

IP Address or ASN

Enter an IPv4 address, IPv6 address, or ASN number

Related Tools

What Is My IP

Instantly see your public IP address and basic network info

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Find the country, city, ISP, and ASN for any IP address

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Get domain registration details, owner info, and expiry dates