https://en.wikipedia.org/wiki/Numero_sign
WebThe numero sign or numero symbol, №, (also represented as Nº, No, No. or no.), is a typographic abbreviation of the word number(s) indicating ordinal numeration, especially in names and titles.For example, using the numero sign, the written long-form of the address "Number 22 Acacia Avenue" is shortened to "№ 22 Acacia Ave", yet both forms are …