Prefix Information
The prefix 399 is part of area code 781 serving Lexington, Massachusetts.
This exchange contains 10,000 possible phone numbers (781-399-0000 through 781-399-9999).
Phone numbers with prefix 399 in area code 781. Location: Lexington, Massachusetts.
The prefix 399 is part of area code 781 serving Lexington, Massachusetts.
This exchange contains 10,000 possible phone numbers (781-399-0000 through 781-399-9999).