Prefix Information
The prefix 421 is part of area code 516 serving Hempstead, New York.
This exchange contains 10,000 possible phone numbers (516-421-0000 through 516-421-9999).
Phone numbers with prefix 421 in area code 516. Location: Hempstead, New York.
The prefix 421 is part of area code 516 serving Hempstead, New York.
This exchange contains 10,000 possible phone numbers (516-421-0000 through 516-421-9999).