Prefix Information
The prefix 640 is part of area code 865 serving Knoxville, Tennessee.
This exchange contains 10,000 possible phone numbers (865-640-0000 through 865-640-9999).
Phone numbers with prefix 640 in area code 865. Location: Knoxville, Tennessee.
The prefix 640 is part of area code 865 serving Knoxville, Tennessee.
This exchange contains 10,000 possible phone numbers (865-640-0000 through 865-640-9999).