How can I see which domain names are in the top rankings for certain keywords?

[Dd]

I know how to check what the ranking of a specific domain is, how can I scan a keyword to see what sites are listed top for that specific keyword?

I'm using firefox

[flybishop]

Just type your keyword in to Google and the first page that pops up is the highest ranking site. That's what a search engine is all about.

If you want to see where your site ranks for certain keywords, sign up for Google Webmaster Tools and Google analytics.

[paul755]

Yeah, using search engines or a keyword tool.
Using your domain name as keyword, will help you get good pR on the serps, you should Place the primary keyword phrase at the beginning of the domain name.