Prefix Information
The prefix 399 is part of area code 973 serving Newark, New Jersey.
This exchange contains 10,000 possible phone numbers (973-399-0000 through 973-399-9999).
Phone numbers with prefix 399 in area code 973. Location: Newark, New Jersey.
The prefix 399 is part of area code 973 serving Newark, New Jersey.
This exchange contains 10,000 possible phone numbers (973-399-0000 through 973-399-9999).