Access WhoIs server in ActionScript 3.0

I want to verify a domin name existance through the server let's say "[login to view URL]". Please provide efficient script workable in Adobe AIR 4.1 sdk (ActionScript 3.0). Below is the code for accessing through HTTP request. But I'm searching for an alternative way like telnet/remote server or any other efficient way. private function ResolveDNS():void{ var <A href="String">url:String; var sch:String; url="[[login to view URL]][1]"; sch="No match for"; var request:URLRequest = new URLRequest(); var requestVars:URLVariables = new URLVariables(); var loader:URLLoader = new URLLoader(); request.url=url; [login to view URL] = [login to view URL]; [login to view URL]([login to view URL], onLoaded); [login to view URL](request); function onLoaded(evt:Event):void { if(String([login to view URL]).indexOf(sch)==-1) txtResult = "Exists"; else txtResult = "Does not exist."; } }