Skip to content

Tools Articles About

Tools/Internet/Whois and ASN lookup

Whois and ASN lookup

public API

Owner of an address or AS, prefix, country and registry records.

More toolsWhat is my IP BGP looking glass IPv4 subnet calculator IPv6 subnet calculator DNS lookup

Tools

Addressing

Domains and certificates

Internet

Server-side diagnostics

Content

Information

Where the data comes from

Calculators run in your browser. DNS, whois and BGP use public services, and the tests marked “server” (SSL/TLS, ports, traceroute, MTU, DNSBL) run from the routing.pl server.