If you engage in link exchange to boost your SEO link popularity, there is a tool you should include in your arsenal and that is the Zontu link monitoring tool.
https://zontu.com/external-link/links
The benefit of using this tool is vast. With it, you can organize all your link exchanges in one place and track them in realtime.
An email notification is sent to you if your link is REMOVED or change your link to NO-FOLLOW. You can also use the "Check link button" to check link manually.
One good thing about this is that it is free to use.