Prefix Information
The prefix 340 is part of area code 573 serving Columbia, Missouri.
This exchange contains 10,000 possible phone numbers (573-340-0000 through 573-340-9999).
Phone numbers with prefix 340 in area code 573. Location: Columbia, Missouri.
The prefix 340 is part of area code 573 serving Columbia, Missouri.
This exchange contains 10,000 possible phone numbers (573-340-0000 through 573-340-9999).