ARIN check library

arin.js

var net = require('net');

var ARIN = function(ip,keyword,callback){
	var arin = {
		port: 43,
		host: 'whois.arin.net'
	};

	var client = net.connect(arin.port,arin.host);

	client.on('connect',function(){
		console.log('Connected to whois.arin.net on port 43');
		client.write('n '+ip+'\n');
	});

	var response = '';
	client.on('data',function(data){
		response += new Buffer(data).toString();
	});

	client.on('end',function(data){
		callback(null,response.toLowerCase().indexOf(keyword.toLowerCase())>0)
	});

	client.on('error',function(error){
		callback(error);
	})
};

module.exports = ARIN;

test-arin.js

var ARIN = require('./lib/arin');

ARIN('213.46.228.196','amsterdam',function(err,flag){
	console.log('ARIN check is',flag);
});