fathom - 6:17 pm on Jun 2, 2013 (gmt 0)
You can use service from majestic , ahrefs or linkdetox to find out
That isn't necessarily true... they interpret data sure... but interpreting a bad link is not a confirmation that Google in fact devalued that as a bad link (or will devalue that as a bad link), just like you interpreting a good link is not a confirmation that Google equally agreed.
The point that I make here is Google frowns on link scheming. Show PENGUIN "1," only one link exchange and it will not detect that single link as a bad link... show PENGUIN 999,999 other link exchanges plus that same one link for a grand total of one million link exchanges and it will see all one million as bad links... so why was that first link acceptable?
The SCHEME through volume changed the context by pushing the page(s) to a threshold detection value.
None of those services (majestic, ahrefs or linkdetox) uses threshold as a variable so they are not always accurate.