Prefix Information
The prefix 399 is part of area code 512 serving Austin, Texas.
This exchange contains 10,000 possible phone numbers (512-399-0000 through 512-399-9999).
Phone numbers with prefix 399 in area code 512. Location: Austin, Texas.
The prefix 399 is part of area code 512 serving Austin, Texas.
This exchange contains 10,000 possible phone numbers (512-399-0000 through 512-399-9999).