You probably know Google’s link command. It’s a special search query that allows you to find web sites that link to another web site.
For example, if you want to find web pages that link to Microsoft.com, enter “link:www.microsoft.com” in Google’s search box.
Many links are missing in Google’s link search
Unfortunately, Google’s link command is not as useful as it used to be. It doesn’t show all pages that are linking to yours. Actually, Google shows only a small selection.
Google’s search results pages show only a sample of the links that point to a page, so this list is in no way indicative of the link structure utilized by Google to formulate a page’s PageRank.
PageRank 4 and higher? That used to be.