Prefix Information
The prefix 340 is part of area code 564 serving Vancouver, Washington.
This exchange contains 10,000 possible phone numbers (564-340-0000 through 564-340-9999).
Phone numbers with prefix 340 in area code 564. Location: Vancouver, Washington.
The prefix 340 is part of area code 564 serving Vancouver, Washington.
This exchange contains 10,000 possible phone numbers (564-340-0000 through 564-340-9999).