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You can find a location (latitude, longitude) using any piece of address information.
Now obviously you can have a latitude long corresponding individually to a country, state, city, zip , address, etc and each will be more and more accurate, the more information you use.
If the task is to find say restaurants, providing pincode should be enough.
but if you want to route from point A to point B , providing destination pincode will be hardly useful it won't point your exact location.