Prefix Information
The prefix 340 is part of area code 219 serving Gary, Indiana.
This exchange contains 10,000 possible phone numbers (219-340-0000 through 219-340-9999).
Phone numbers with prefix 340 in area code 219. Location: Gary, Indiana.
The prefix 340 is part of area code 219 serving Gary, Indiana.
This exchange contains 10,000 possible phone numbers (219-340-0000 through 219-340-9999).