Prefix Information
The prefix 257 is part of area code 917 serving New York City, New York.
This exchange contains 10,000 possible phone numbers (917-257-0000 through 917-257-9999).
Phone numbers with prefix 257 in area code 917. Location: New York City, New York.
The prefix 257 is part of area code 917 serving New York City, New York.
This exchange contains 10,000 possible phone numbers (917-257-0000 through 917-257-9999).