Wellesley, Mass., located in Norfolk county, actually has three zip codes.:
*02481 covers the northern and eastern-most parts of Wellesley, including Wellesley Hills, and borders Newton, Needham and Weston.
*02482 covers the southern and western-most parts of Wellesley, including Wellesley College, and borders Natick, a bit of Weston, Dover and Needham.
*02457 covers Babson Park, where Babson College is, and has its own post office on Forest Street.
The United States Zip Codes website has good maps of the Wellesley zip code areas.