Check my DNS for issues

Ever since I’ve moved on to my current ISP I’ve noticed frequent PAGE NOT FOUND errors which may be related to my ISP. So I’ve decided to check my ISP’s DNS for problems.
Any pointers on how to do this and is this possible??

The first thing to do, is make sure the problem lies with your ISP DNS and is not something related to a configuration problem on your PC/router. To that end, I’d do is check the Windows event logs for any DNS errors and I’d open a command prompt and type nslookup and see what I get back. If you want to do those things and report back, we can go from there.

You can also check you’re dns servers with GRC DNS tool: