Prefix Information
The prefix 340 is part of area code 507 serving Rochester, Minnesota.
This exchange contains 10,000 possible phone numbers (507-340-0000 through 507-340-9999).
Phone numbers with prefix 340 in area code 507. Location: Rochester, Minnesota.
The prefix 340 is part of area code 507 serving Rochester, Minnesota.
This exchange contains 10,000 possible phone numbers (507-340-0000 through 507-340-9999).