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If this page is ranking because of QDF, then it will probably be short lived unless it develops a strong link profile because of its attention.
As I said its a "location + widget" search and the URL ranking around number 7 is from a big site that has widget for locations all over the world. The top level URL has plenty of backlinks, but the URL specific to the location, that ranks, does not have any external backlinks but still ranks No.7.
Could it be that enough juice is passed down from the homepage? or from internal links?
Why does the URL rank with no backlinks? when others around it do have backlinks.
I only checked the link profile using yahoo link:domain, does anyone else no off a better way?
How would I look for a 301 redirect
If you want to play detective on your own, you can often find such 301s by checking for other domains on the same IP address as the main site. If all a domain does is 301 redirect, it is unlikely to serve it on a unique IP, although sometimes you will find a portfolio of 301 domains on one IP address and the main domain on a second.