In terms of what the OP wanted the addressess for, he doesn't really have to be concerned with subnetting/broadcast-addresses/network-addressess.
If he worried about that his job would be massive! A lot of networks don't have the same masks as eachother, e.g. different network and bc address.
to the OP: All you need to know is yes, you were right. That's how they increment. And Iuno, there might be a site somewhere which gives a rundown of block ip addresses in different areas of the world. That'd make your job easier.
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