The paper provides some materials on the history of appearance and using of number place names in Vietnam with materials in the Hanoi area. With the political purposes to build a colonial city and demolish the historical marks of the city, the French applied this method to identify the administrative units of the division and the system of new streets. In the later stages, utilizing the advantages in terms of non-sense words, simplicity, easy to use, place names in number usually were used by authorities in certain historical conditions, especially in the period during and after tbe war. The paper is a suggestion for the authority to add this kind of place name to the official rules serving the urban management in the stage of modernization.