Area code 248 is in that famous part of New York called "Oakland County, Michigan." Suburbs to the north-northwest of Detroit. Someone in New York who moved there from the Detroit area might have a mobile phone with area code 248.
It's a New York cell area code.
Redding is actually in Connecticut, not New York. The area code for Redding, CT, is 203, with overlay code 475.
001 and then the New York number including the area code
Buffalo, NY, is area code 716.
Syracuse is in area code +1 315.
Rochester, NY, is in area code 585.
The area code 516 is a US area code used in New York. The area code 516 is specifically used in Long Island, New York, in the Nassau county. The area code applies to both cell phones and landlines in the area.
Saratoga County, New York, is in area code 518.
631
Area code 518 covers 24 counties in the state of New York. It is the largest area code in size in the state of New York. Some cities in the 518 area code include Albany and Schenectady.
Springville, New York, is in area code 716.
Whitehall, New York, is in area code 518, the same as Albany.