<P> Area code 616 is the North American Numbering Plan (NANP) area code for the west - central portion of the Lower Peninsula of Michigan . The area code is centered around Grand Rapids, and also includes Holland, Greenville, and Grand Haven . It includes all of Kent and Ottawa counties, and parts of neighboring counties, including the western and central parts of Ionia County . </P> <P> 616 was created in 1947 as one of the original area codes . It originally served the entire western half of the Lower Peninsula, as well as the Upper Peninsula . It was by far the largest of Michigan's three original numbering plan areas, covering as much territory as 313 and 517 combined . It was also the largest numbering plan area east of the Mississippi River that did not cover an entire state . In 1961, the Upper Peninsula split off as area code 906 . </P>

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