To use this method of sending raw data through the proxy for WHOIS protocol you must get approved by your account manager
let auth = 'USER:PASS'; let http = require('http'); let conn = http.request({ host: 'brd.superproxy.io', port: 22225, method: 'CONNECT', path: 'whois.eu:43', headers: { 'Proxy-Authorization': 'Basic '+Buffer.from(auth).toString('base64'), } }) .on('connect', (res, socket, head)=>{ if (res.statusCode!=200) console.error('CONNECT failed:\n'+res.headers); res.on('error', e=>console.error('CONNECT error: '+e.message)); socket.on('error', e=>console.error('socket error: '+e.message)); socket.on('timeout', e=>console.error('socket timeout: '+e.message)); socket.on('data', d=>console.log(Buffer.from(d).toString())); socket.write('test.eu\r\n', console.error); }) .on('error', console.error) .end();