Prefix Information
The prefix 640 is part of area code 479 serving Fort Smith, Arkansas.
This exchange contains 10,000 possible phone numbers (479-640-0000 through 479-640-9999).
Phone numbers with prefix 640 in area code 479. Location: Fort Smith, Arkansas.
The prefix 640 is part of area code 479 serving Fort Smith, Arkansas.
This exchange contains 10,000 possible phone numbers (479-640-0000 through 479-640-9999).