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Prefix WhoIs

Official registry Search and web

Live BGP routing table and registry lookups: IP origin, ASN prefixes, transit, org search.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http prefix-whois 'https://pwhois.org/mcp/'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "prefix-whois": {
            "type": "http",
            "url": "https://pwhois.org/mcp/"
        }
    }
}

Frequently asked questions

What is Prefix WhoIs?

Live BGP routing table and registry lookups: IP origin, ASN prefixes, transit, org search.

How do I install Prefix WhoIs?

It runs as a remote server. In Claude Code: claude mcp add --transport http prefix-whois 'https://pwhois.org/mcp/'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Prefix WhoIs need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains Prefix WhoIs?

It is published by org.pwhois. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.