Prefix Information
The prefix 399 is part of area code 215 serving Philadelphia, Pennsylvania.
This exchange contains 10,000 possible phone numbers (215-399-0000 through 215-399-9999).
Phone numbers with prefix 399 in area code 215. Location: Philadelphia, Pennsylvania.
The prefix 399 is part of area code 215 serving Philadelphia, Pennsylvania.
This exchange contains 10,000 possible phone numbers (215-399-0000 through 215-399-9999).