Main city: Williamson
Timezone: Eastern
Phone type: Landline
Operator: Verizon New York

Williamson, an Upstate New York town on the south shore of Lake Ontario in the northwest part of Wayne County, New York, in the United States. The population was 6,777 at the time of the 2000 census. The town is named after Charles Williamson, a land agent of the Pultney Estate. Its ZIP code is 14589, and telephone exchanges 589 and 904 in area code 315. ^source

Area code 315 is a telephone area code in upstate New York. It stretches from the eastern border of Monroe County to Little Falls, north to the Canadian border, east to Massena and south to near Cortland. Most of its population lives in Syracuse and its suburbs. Other major population centers include Utica and Watertown. One of the original area codes created in 1947, it has been split once. In 1954, its southern portion was combined with the eastern portion of area code 716 to form area code 607. ^source