The company I work for has 600+ sub-domains with city-based names. The overall root domain receives 2 billion PVs (yes, billion!) a month, with varying degrees of traffic for each city. Some cities have under utilized potential, whereas others with backlink authority have great results. I want to close the gaps and garner more traffic for the cities that have the potential.
My question is, I would like to check Google rankings for our major marque keywords, and act as if I am sitting at my computer in 50+ metro areas so I see the true IP-based results . How would I do this? Is there an specific sites or software that can be used that will act as if I am in those cities and show me results based on that?