Why not try it out? The Netcraft Anti-Phishing Toolbar provides detailed information about a website you are visiting, providing protection against phising attacks.
The Netcraft Toolbar uses Netcraft's enormous databases of web site information to show you all the attributes of each site you visit on the Web, including the sites' hosting location, country, longevity and popularity.
It also mobilizes the Netcraft community into a giant neighbourhood watch scheme to empower the most alert and experienced members to protect the vulnerable against fraud and phishing attacks.
The toolbar has many features, including a clear display of sites' hosting location which at all times helps you validate fraudulent urls, and much more.