Prefix Information
The prefix 340 is part of area code 509 serving Spokane, Washington.
This exchange contains 10,000 possible phone numbers (509-340-0000 through 509-340-9999).
Phone numbers with prefix 340 in area code 509. Location: Spokane, Washington.
The prefix 340 is part of area code 509 serving Spokane, Washington.
This exchange contains 10,000 possible phone numbers (509-340-0000 through 509-340-9999).