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Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth.
npx @getmcp/cli add dev.numberrank/numberrankRequires Node.js 18+. Community-contributed server. Review source before installing.
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"dev.numberrank/numberrank": {
"url": "https://numberrank.dev/mcp",
"transport": "streamable-http"
}
}
}