Prefix Information
The prefix 840 is part of area code 507 serving Rochester, Minnesota.
This exchange contains 10,000 possible phone numbers (507-840-0000 through 507-840-9999).
Phone numbers with prefix 840 in area code 507. Location: Rochester, Minnesota.
The prefix 840 is part of area code 507 serving Rochester, Minnesota.
This exchange contains 10,000 possible phone numbers (507-840-0000 through 507-840-9999).