We're about to release a new version of the Twitter text processing library we’re using for auto linking and extraction of usernames, lists & hashtags. This change will now extract URLs that have no specified protocols. Concretely, it will add http:// to the beginning of no-protocol URLs if: Host name ends with gTLD (i.e. twitter.com) Host name has 2 sub-domains followed by ccTLD (i.e. yahoo.co.jp