What is 516 area code?

The 516 area code is located in the state of New York and covers areas such as Long Island, Hempstead, Garden City, and Hicksville. It was established in 1999 as an overlay of the 516 area code to address the increasing demand for phone numbers in the region. The 516 area code is one of the original 86 area codes created by AT&T in 1947. It serves Nassau County and a small portion of Suffolk County on Long Island.