There are four zones for Saint John City Police. Basically North, East, West, and South/Centre. If you heard someone referring to "Central" it was most likely referencing the dispatch/station. Units are referenced by their three digit number, typical patrol all beginning with "1" so many times you'll hear them referred to by only the last two numbers... for example "25" being 125 and so on. Because of the relatively small number of units in the City, there is no need to separate calls by zone and unit number.