<div dir="ltr"><div class="gmail_extra">If you want pure and unambiguous identifiers for web sites, use dotted-decimal IP addresses or its <a href="http://en.wikipedia.org/wiki/IPv6_address#Recommended_representation_as_text">IPv6 equivalent</a>.</div><div class="gmail_extra"><br></div><div class="gmail_extra">markus</div></div>