Potowomut is often mistakenly thought to be part of the Town of East Greenwich .
Potowomut shares the same ZIP code as all of Town of East Greenwich   and because Town of East Greenwich   is the preferred place name for postal purposes .
Potowomut is often mistakenly thought to be part of the Town of East Greenwich because it shares the same ZIP code as all of East Greenwich and because East Greenwich is the preferred place name for postal purposes .