How to know where conversions came from with multiple links pointing to same aff id?

Let's suppose that I have one affiliate account and I have 100 different blogs/websites linking to it.

How would I go about tracking which blogs/websites are converting the best without testing each one individually?

Any ideas would be greatly appreciated.

 

Nevermind, I found the answer. If anyone else has the same question, the answer is to use sub id's.

 

my Q is does all network offers this facility of sub id's

 

I'm not sure if all affiliates allow sub id's, but the one I use does. I'm told that most do, or at least should.

 

Another way that is not that good, but may work is that you could use something like domainname.php?merchant=2333prod=2332&blog=2 for each link. This will also help with affiliate cloaking. Well when someone clicks the link it will take them through to a page where you can then insert the merchant, product and blog information into a database table that also keep the time of the click. You can then match this information with the stats information of the products sales to see where the click is likely to have come from.

Saying this though, quite a few networks offer sub id's and if they don't there are also quite a few networks that will give you the url of the page that the click came from before it lead to a sale.