Prefix Information
The prefix 640 is part of area code 540 serving Roanoke, Virginia.
This exchange contains 10,000 possible phone numbers (540-640-0000 through 540-640-9999).
Phone numbers with prefix 640 in area code 540. Location: Roanoke, Virginia.
The prefix 640 is part of area code 540 serving Roanoke, Virginia.
This exchange contains 10,000 possible phone numbers (540-640-0000 through 540-640-9999).