Knowledge Base: Networks: Whois Lookups from behind a firewall or proxy server

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All About Whois

About Whois What is Whois? IP Whois Domain Whois Port 43 High Speed Lookups Whois Clients Whois Proxies Country Code Domains Strange Whois Results Geographical Location New Org Registry

Whois from behind a proxy server or firewall

If you are behind a firewall or proxy the whois lookups may not work. If this is the case ask your system administrator to open up TCP port 43.