Prefix Information
The prefix 340 is part of area code 209 serving Stockton, California.
This exchange contains 10,000 possible phone numbers (209-340-0000 through 209-340-9999).
Phone numbers with prefix 340 in area code 209. Location: Stockton, California.
The prefix 340 is part of area code 209 serving Stockton, California.
This exchange contains 10,000 possible phone numbers (209-340-0000 through 209-340-9999).