CoordinateRanges

CoordinateRanges[]
gives the intervals over which each of the coordinates in the default coordinate system may range.

CoordinateRanges[coordsys]
gives the ranges for each of the coordinates in the coordinate system coordsys.

To use CoordinateRanges, you first need to load the Vector Analysis Package using Needs["VectorAnalysis`"].

Needs["VectorAnalysis`"]

Range of coordinate values in the default system:

Needs["VectorAnalysis`"]

Range of coordinate values in another system: