Google hides alot of links they do this as there are about 26 known data centers USA based. Finding who is linking to you is somewhat easy search for link:yourdomain.com and you can see whom is linking to you and from where we have created a tool that auto checks that trades are in place when this is an issue , if someones site no longer links to our client it auto deletes their link from the site we are using to trade with. using market leap will give you the correct overall amount of backlinks google hides , true to form google created itself on backlinks and then tries it best to roll up the ladder under itself . Recall google started as backrub before the name change and its goal was to rank sites based on the overall amount of one way backlinks comming to a given site. Thanks Willam Andrassy