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is it possible to get list of all countries
all regions in that countries
all cities in that regions
and all streets in that cities ?
Sounds like you want access to the entire Bing Maps database. The type of data you want isn't available in the form you want. Bing Maps is meant for querying a location and finding lat/lon or submitting a lat/lon and returning location information.
For the type of search you want, you will have best results by contacting a data provider like Navteq.
This is not the right place to get data of coutires/cities.....
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