string strText="212.56.87.23 Dotnetspider.com"; 
  
Regex oRegex=new Regex(@"(?(\d|\.)+)\s"+@"(?\S+)"); 
  
MatchCollection oMatchCollection=oRegex.Matches(strText); 
  
foreach(Match oMatch in oMatchCollection) 
{ 
  
 Console.WriteLine("IP: "+oMatch.Groups["IP_ADDRESS"]); 
 Console.WriteLine("URL: "+oMatch.Groups["URL"]); 
}