Prefix Information
The prefix 340 is part of area code 417 serving Springfield, Missouri.
This exchange contains 10,000 possible phone numbers (417-340-0000 through 417-340-9999).
Phone numbers with prefix 340 in area code 417. Location: Springfield, Missouri.
The prefix 340 is part of area code 417 serving Springfield, Missouri.
This exchange contains 10,000 possible phone numbers (417-340-0000 through 417-340-9999).