In the whole of USSR (and after its dissolution too), the order of addresses was big-endian: from the larger administrative unit to smaller (which seems quite logical — first you enter the country, then find the district, then the town, then the street, then the house, then the person therein, thus the address replicates the travel path of the package).

Some countries (doubtless those that entered EU, also Ukraine, can’t say for the rest) officially changed the order to be little-endian, but many older folks, who still use snail mail and write letters and postcards, don’t bother.