Area codes 315 and 680 Information (Geography)
Area codes 315 and 680 are telephone area codes serving north- central New York. They stretch from the western side of Wayne County to Little Falls, north to the Canada–United States 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.
The main area code, 315, was one of the original area codes created in 1947. It originally stretched through the Binghamton area, all the way to the Pennsylvania border. In 1954, its southern portion, including Binghamton, was combined with the eastern portion of area code 716 to form area code 607.
New York State regulators announced that 315 had been projected to become "exhausted" in the third quarter of 2010. The New York State Public Service Commission at the time weighed two options: an overlay area code, or a split into two codes. A split would have included a north-south arrangement, splitting Oswego County and the north from 315, or an east-west split, with Oswego and Onondaga forming the boundary. Regulators met to discuss a second code in the 315 region; because of economic conditions, assignable numbers did not run out in the third quarter of 2010 as predicted. The revised projected exhaustion date was March 11, 2017, at which point the 680 area code was introduced, creating the first overlay in the upstate region.  
Since 2017, callers must dial 10 digits for local calls; attempts to make a seven-digit call will trigger a recorded message reminding them of the new rule.
- Cayuga, Chenango, Cortland, Fulton, Hamilton, Herkimer, Jefferson, Lewis, Madison, Oneida, Onondaga, Ontario, Oswego, Otsego, Saint Lawrence, Seneca, Wayne, and Yates.
- Adams Center, Adams, Alder Creek, Alexandria Bay, Altmar, Alton, Annsville, Antwerp, Apulia Station, Auburn, Aurora, Ava, Baldwinsville, Barneveld, Beaver Falls, Belleville, Bernhards Bay, Black River, Blossvale, Boonville, Bouckville, Branchport, Brantingham, Brasher Falls, Brewerton, Bridgeport, Bridgewater, Brier Hill, Brookfield, Brownville, Calcium, Camden, Camillus, Canastota, Canton, Cape Vincent, Carthage, Cassville, Castorland, Cato, Cayuga, Cazenovia, Central Square, Chadwicks, Chase Mills, Chaumont, Chippewa Bay, Chittenango, Cicero, Clark Mills, Clay, Clayton, Clayville, Cleveland, Clifton Springs, Clinton, Clockville, Clyde, Cold Brook, Colton, Constableville, Constantia, Copenhagen, Cranberry Lake, Croghan, De Kalb Junction, De Peyster, DeRuyter, Deansboro, Deer River, Deferiet, Delphi Falls, Dewitt, Denmark, Depauville, Dexter, Dolgeville, Dresden, Durhamville, Eagle Bay, Earlville, East Syracuse, East Williamson, Eaton, Edwards, Elbridge, Ellisburg, Erieville, Evans Mills, Fabius, Fair Haven, Fayette, Fayetteville, Felts Mills, Fine, Fishers Landing, Forestport, Fort Drum, Frankfort, Franklin Springs, Fulton, Geneva, Genoa, Georgetown, Glenfield, Gouverneur, Great Bend, Greig, Hailesboro, Hamilton, Hammond, Hannawa Falls, Hannibal, Harrisville, Hastings, Helena, Henderson Harbor, Henderson, Herkimer, Hermon, Heuvelton, Hinckley, Hoffmeister, Holland Patent, Hubbardsville, Ilion, Inlet, Jamesville, Jordan, Jordanville, Keuka Park, King Ferry, Kirkville, Knoxboro, La Fargeville, La Fayette, Lacona, Lawrenceville, Lee Center, Leonardsville, Limerick, Lisbon, Little Falls, Liverpool, Locke, Lorraine, Lowville, Lycoming, Lyons Falls, Lyons, Madison, Madrid, Mallory, Manlius, Mannsville, Maple View, Marcellus, Marcy, Marietta, Marion, Martinsburg, Martville, Massena, McConnellsville, Memphis, Meridian, Mexico, Middleville, Minetto, Minoa, Mohawk, Montezuma, Moravia, Morristown, Morrisville, Mottville, Munnsville, Natural Bridge, Nedrow, New Hartford, New Haven, New Woodstock, New York Mills, Newark, Newport, Newton Falls, Nicholville, Norfolk, North Bay, North Brookfield, North Lawrence, North Pitcher, North Rose, Norwood, Oaks Corners, Ogdensburg, Old Forge, Oneida, Ontario Center, Ontario, Oriskany, Oriskany Falls, Orwell, Oswegatchie, Oswego, Oxbow, Palmyra, Parish, Parishville, Penn Yan, Pennellville, Peterboro, Phelps, Philadelphia, Phoenix, Pierrepont Manor, Plainville, Plessis, Poland, Pompey, Poplar Ridge, Port Byron, Port Gibson, Port Leyden, Potsdam, Preble, Prospect, Pulaski, Pultneyville, Pyrites, Raquette Lake, Raymondville, Red Creek, Redfield, Redwood, Remsen, Rensselaer Falls, Richfield Springs, Richland, Richville, Rodman, Rome, Romulus, Rooseveltown, Rose, Russell, Sackets Harbor, Salisbury Center, Sandy Creek, Sangerfield, Sauquoit, Savannah, Schuyler Lake, Scipio Center, Seneca Castle, Seneca Falls, Sherrill, Skaneateles Falls, Skaneateles, Sodus, Sodus Point, Solsville, Solvay, South Butler, South Colton, South Otselic, Springfield Center, Star Lake, Sterling, Stittville, Stratford, Sylvan Beach, Syracuse, Taberg, Thendara, Theresa, Thousand Island Park, Three Mile Bay, Tully, Turin, Union Springs, Utica, Van Hornesville, Vernon Center, Vernon, Verona Beach, Verona, Waddington, Wampsville, Wanakena, Warners, Washington Mills, Waterloo, Watertown, Waterville, Weedsport, Wellesley Island, West Eaton, West Edmeston, West Leyden, West Monroe, West Stockholm, West Winfield, Westdale, Westernville, Westmoreland, Whitesboro, Williamson, Williamstown, Winthrop, Wolcott, Woodgate, and Yorkville.
|New York area codes: 212/332/646, 315/680, 347/718/929, 516, 518/838, 585, 607, 631/934, 716, 845, 914, 917|
|West: 585||area code 315/680||East: 518/838|
|Ontario area codes: 226/519/548, 249/705, 289/365/905, 343/613, 416/437/647, 807|