Prefix Information
The prefix 640 is part of area code 423 serving Chattanooga, Tennessee.
This exchange contains 10,000 possible phone numbers (423-640-0000 through 423-640-9999).
Phone numbers with prefix 640 in area code 423. Location: Chattanooga, Tennessee.
The prefix 640 is part of area code 423 serving Chattanooga, Tennessee.
This exchange contains 10,000 possible phone numbers (423-640-0000 through 423-640-9999).