<p>How can I find the origins of conflicting DNS records?</p>

An easy way is to use an online domain tool. My favorite is
Domain Tools
(formerly whois.sc). I'm not sure if they can resolve conflicting DNS records though. As an example, the DNS servers for stackoverflow.com are
```
```
NS51.DOMAINCONTROL.COM
  NS52.DOMAINCONTROL.COM
```
```