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Geographic numbers in the New States were assigned area codes starting with 03, in some cases followed by the former East German area code (without the initial 0) or a code similar to it. Thus, Leipzig, for example, which had used East German domestic area code 041, was assigned the new area code 0341 in the unified telephone system. On the other hand, some area codes were changed: for example, the small town of Zossen used to have East German area code 0323, but the new area code is 03377. Area code 030, formerly used by West Berlin, was assigned to the entire reunified Berlin.
030