Prefix Information
The prefix 399 is part of area code 972 serving Dallas, Texas.
This exchange contains 10,000 possible phone numbers (972-399-0000 through 972-399-9999).
Phone numbers with prefix 399 in area code 972. Location: Dallas, Texas.
The prefix 399 is part of area code 972 serving Dallas, Texas.
This exchange contains 10,000 possible phone numbers (972-399-0000 through 972-399-9999).