yesterday I was trying to figure out how to look up the nameservers of a domain including the vanity/parent nameservers using a tool like nslookup or host, it took me a good 10 rephrasings before i found a stackoverflow post answering the question, and not just a tutorial on how to set up vanity nameservers at X registrar/hosting company
Specifically, it's handy to have the query, and the URL that you think would be the best result.
Google engineers can then peer in and see why that URL didn't rank highly.
The most common reason is it's behind an invisible captcha or blocked by robots.txt, so do check that.