To know who exactly is on the internet. within the IPv4 address space...

gistfile1.txt

#!/usr/bin/env node
var cp = require('child_process');
var sys = require ('sys')
var fs = require ('fs')

var lines = require ('lines')
var nextAddress;
var i=1, j=1, k=1;
nextAddress = function() {
    ++k;
    if(k >= 255) {
	k = 1;
	++j;
	if(j >= 255) {
	    j = 1;
	    ++i;
	    if(i >= 255) {
		throw new Error("No more addresses to test");
	    }
	}
    }
    return ''+i+'.'+j+'.'+k+'.255';
};

function spawnProcess() {
    var address = nextAddress();
    var new_process = cp.spawn('whois', [address]);
    console.log('spawned whois for ' + address);
    new_process.address = address;
    lines(new_process.stdout);
    new_process.stdout.setEncoding('utf8');
    new_process.stdout.on('line', function(line) {
	if(line.indexOf('TMG') != -1) {
	    console.log(new_process.address + ' is TMG');
	    this.removeAllListeners('line');
	    this.removeAllListeners('data');
	}
    });
    new_process.on('exit', function(code, signal) {
	spawnProcess();
    });
}
function init() {
    for(var i=0 ; i<MAX_PROCESS ; ++i) {
	spawnProcess(); 
    }
}


var MAX_PROCESS = parseInt(process.argv[2]);
if(isNaN(MAX_PROCESS)) {
    console.log('no parameter for pool')
    process.exit()
}

fs.readFile('tmg-whois-progress', 'utf8', function(err, data) {
    if(err) {
	init();
	return;
    }
    console.log(sys.inspect(data));
    console.log('stopped last time at ' + data.trim());
    console.log('would you like to continue from there? (y/n): ');
    function readinput (input) {
	if(input.indexOf('y') != -1) {
	    data = data.trim(); 
	    var split = data.split('.');
	    i = parseInt(split[0]);
	    j = parseInt(split[1]);
	    k = parseInt(split[2]);
	}
	this.removeListener('data', readinput);
	init();
    }
    process.openStdin().on('data', readinput);
    process.openStdin().setEncoding('utf8');
});

process.on('SIGINT', function() {
    var progress = ''+i+'.'+j+'.'+k+'.255';
    fs.writeFileSync("tmg-whois-progress", progress, 'utf8');
    process.exit();
});