Prefix Information
The prefix 640 is part of area code 516 serving Hempstead, New York.
This exchange contains 10,000 possible phone numbers (516-640-0000 through 516-640-9999).
Phone numbers with prefix 640 in area code 516. Location: Hempstead, New York.
The prefix 640 is part of area code 516 serving Hempstead, New York.
This exchange contains 10,000 possible phone numbers (516-640-0000 through 516-640-9999).