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My problem is that I have a site which has requires a dedicated page for every city I choose to support. Early on, I decided to use subdomains rather than a directly after my domain (ie i used rather than I realize now that this was a major mistake because Google seems to treat as a completely different site as So for instance, if i search "la food truck map" my site will be near the top, however, if i search "nyc food truck map" im no where in sight because wouldnt be very high in the page rank by itself, and it doesnt have the boost that it ought to be getting from the better known

So a mistake I made a year ago is now haunting my page rank. I'd like to know what the most painless way of resolving my dilemma might be. I have received so much press at that I can't just kill the site, but could I re-direct all requests at to and do the same for all cities supported without trashing my current, satisfactory page rank results I'm getting from ??

EDIT I left out some critical information. I am using Google Apps to manage my domain (that is, to add the subdomains) and Google App Engine to host my site. Thus, Google Apps provides a simple mechanism to mask (the app engine domain) as, but I don't see how I can mask it as If I can get this done, then I can just 301 redirect to as suggested below.

Thanks so much!

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From my knowledge of SEO, switching your subdomain will cause you to lose your ranking. I've been caught with this problem in the past and after spending lots of time and money on "SEO Consultants" (be wary of them, SEO is more of a black art than a science), our company decided to take the hit and do a redirect. The good news is, because we had enough organic traffic, our rank was back up to the top in less than a month.

Probably not the answer you were hoping for...

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